{"id":81,"date":"2026-07-26T05:59:47","date_gmt":"2026-07-26T05:59:47","guid":{"rendered":"https:\/\/njsr.com.ng\/trendsphere\/?p=81"},"modified":"2026-07-26T05:59:49","modified_gmt":"2026-07-26T05:59:49","slug":"edmontons-summer-from-hell-record-rainfall-15-times-more-mosquitoes-than-last-year-empty-bug-spray-shelves-a-west-nile-warning-and-a-population-under-siege-for-the-first-time-since-1990","status":"publish","type":"post","link":"https:\/\/njsr.com.ng\/trendsphere\/2026\/07\/26\/edmontons-summer-from-hell-record-rainfall-15-times-more-mosquitoes-than-last-year-empty-bug-spray-shelves-a-west-nile-warning-and-a-population-under-siege-for-the-first-time-since-1990\/","title":{"rendered":"Edmonton’s Summer From Hell: Record Rainfall, 15 Times More Mosquitoes Than Last Year, Empty Bug Spray Shelves, a West Nile Warning, and a Population Under Siege for the First Time Since 1990"},"content":{"rendered":"\n
\n

A city scientist who got a mosquito bite on his tongue the last time it was this bad. Traps that went from 5 mosquitoes in May to 535 in three weeks. 30 species identified and swarming. Skeeter syndrome sending Albertans to hospital. West Nile virus detected in Calgary earlier than ever. And a simple, urgent question that every Edmonton resident is asking: When does this end?<\/em><\/p>\n<\/blockquote>\n\n\n\n

Introduction<\/strong><\/p>\n\n\n\n

It began with rain. In June 2026, Edmonton recorded its rainiest June in the history of Environment Canada’s observations of the capital region \u2014 more than 100 millimetres in a single weekend alone, followed by week after week of additional precipitation that filled roadside ditches, low-lying parks, wetland areas, and suburban backyards with the standing water that mosquitoes require to lay their eggs and hatch their larvae. The water appeared, as Mike Jenkins, the City of Edmonton’s senior scientist and pest management coordinator, put it, “in places I haven’t seen in literally decades.” And wherever the water appeared, within days, the mosquitoes followed.<\/p>\n\n\n\n

As of July 25, 2026, Edmonton’s mosquito population stands at fifteen times higher than it was at this same point in summer 2025. The city’s monitoring traps \u2014 the standard scientific instrument for tracking mosquito population density across urban landscapes \u2014 recorded 5 mosquitoes per trap during the last week of May. By the third week of June, that figure had risen to 535 per trap: a greater than 10,000 per cent increase in a single month. And by late July, the population had climbed further still, to levels not seen since the early 1980s \u2014 making the summer of 2026 the worst mosquito season Edmonton has experienced in more than 40 years.<\/p>\n\n\n\n

Bug spray has disappeared from store shelves. Hardware stores, pharmacies, and outdoor retailers across Edmonton and the surrounding capital region have been unable to keep DEET-based repellents and other protective products in stock, with residents taking to social media to swap tips on where to find remaining supplies. The Royal Alberta Museum’s invertebrate zoology curator is fielding more mosquito questions than at any point in recent memory. A dermatological condition called “skeeter syndrome” \u2014 a hypersensitive immune reaction to mosquito bites that produces large, painful welts and is being diagnosed in increasing numbers of Albertans \u2014 has emerged as a genuine medical concern. And just across the provincial border, West Nile virus has been detected in Calgary mosquitoes earlier in the season than researchers have ever previously observed \u2014 raising the health stakes of what might otherwise have been merely a miserable summer nuisance into something with genuine public health consequences.<\/p>\n\n\n\n

The Man Who Has the City’s Only Tongue Bite Story<\/strong><\/p>\n\n\n\n

To understand how unusual 2026 is in the context of Edmonton’s mosquito history, no source is more instructive than Mike Jenkins \u2014 the City of Edmonton’s senior scientist and pest management coordinator, a man who has been monitoring the city’s insect population for long enough that his most vivid comparative reference point is a personal story from 1990.<\/p>\n\n\n\n

“The last time Edmontonians were vigorously swatting the flies was in 1990,” Jenkins told Global News. Then, in a detail that has become the most-quoted anecdote of Edmonton’s 2026 mosquito crisis, he described his own experience during that previous peak year: “I got so many mosquito bites. I actually got one on my tongue back then.” A mosquito that landed on his tongue while he was outdoors, that he didn’t notice until it had already begun feeding. “She took off before I noticed that she was feeding on my tongue,” he said.<\/p>\n\n\n\n

The 1990 comparison is significant because it establishes the historical baseline against which this summer should be measured. Jenkins has since clarified in CBC reporting that the current population is the highest since the early 1980s \u2014 a refinement that suggests 2026 may actually be worse than 1990, pushing the comparative reference point back a further decade to the early Reagan era. By any measure, the people of Edmonton are experiencing something that nobody under the age of approximately 55 has ever lived through in this city before.<\/p>\n\n\n\n

Jenkins has been the public face of the city’s mosquito management response throughout the summer, appearing in media interviews with a combination of scientific precision about what is happening and honest pragmatism about the limits of what the city’s control programme can achieve in these conditions. His monitoring data drives the city’s larviciding programme \u2014 targeted treatments using a biological pesticide called Bti (Bacillus thuringiensis israelensis), a naturally occurring soil bacterium that is lethal to mosquito larvae but has no significant effect on other insects, birds, fish, or mammals \u2014 which the city deploys in priority hatching habitats including roadside ditches along freeways and swampy areas near busy parks and trails.<\/p>\n\n\n\n

The Population Explosion: Numbers That Require a Second Reading<\/strong><\/p>\n\n\n\n

The specific population trajectory documented in Edmonton’s monitoring trap data is worth presenting in full, because the numbers require a moment to absorb.<\/p>\n\n\n\n

In the last week of May 2026, city traps recorded an average of 5 mosquitoes per trap during the week. Cold temperatures during the spring, combined with dry ground that absorbed most of the spring runoff, had kept mosquito populations suppressed. Five mosquitoes per trap is an entirely manageable baseline \u2014 background noise, essentially, in the city’s ongoing population monitoring.<\/p>\n\n\n\n

By the first week of June, as early rainfall began to activate hatching in standing water across the city, the trap average had risen to 21 mosquitoes. Still not alarming. Then June’s record rainfall arrived. By the second week of June, the average had jumped to 289 per trap. By the third week of June, it was 535 per trap. The population had multiplied more than a hundredfold in three weeks. And the rain was still falling.<\/p>\n\n\n\n

By late July, city data showed the population at 15 times the level recorded at the same point in summer 2025 \u2014 a year that was itself not considered a particularly low mosquito year. Jenkins described the current population as the highest since the early 1980s. CTV News, citing city data reviewed for its July 24 reporting, described the week ending around July 24 as potentially “the pinnacle of the largest mosquito populations the city has seen in at least five years, if not decades.” 30 different species have been identified in Edmonton’s current population \u2014 a species diversity that reflects the breadth and depth of hatching conditions across the many different water types and habitats that record rainfall has produced across the capital region.<\/p>\n\n\n\n

Why This Happened: The Biology of a Perfect Mosquito Summer<\/strong><\/p>\n\n\n\n

The mosquito population explosion of 2026 is not mysterious or random. It is the entirely predictable biological response to a specific set of environmental conditions that arrived simultaneously and reinforced each other with compounding effect.<\/p>\n\n\n\n

The core mechanism begins with water. The great majority of Edmonton’s mosquito species are what entomologists call “floodwater species” \u2014 mosquitoes that lay their eggs on the vegetation around ponds and low-lying areas, where the eggs can remain dormant in dry conditions for months or even years. When rain arrives and water levels rise, the eggs are activated by contact with the water and begin hatching. The more extensive the flooding, the larger the land area that is converted into active mosquito breeding habitat, and the larger the hatching event that follows.<\/p>\n\n\n\n

Edmonton’s June 2026 rainfall did not merely create breeding habitat. It created it at a scale and in locations that had not held water in years or decades. Jenkins’s observation that he was seeing “water in places I haven’t seen in literally decades” captures precisely why this year’s population is not merely above average but historically exceptional: water reached dormant egg deposits that had been accumulating in dry soil for years, activating multiple years’ worth of potential mosquito generations simultaneously. One wet summer activates one year’s egg deposits. A very wet summer following an extended dry period activates the accumulated deposits of many years \u2014 which is precisely the biological mechanism behind the scale of 2026’s emergence.<\/p>\n\n\n\n

The weather sequence that followed the initial flooding then optimised conditions for rapid population growth. Female mosquitoes require a blood meal to develop their eggs \u2014 without protein from blood, they cannot reproduce. The warm, sunny weather that followed Edmonton’s record June rainfall created exactly the conditions that drive mosquitoes to seek blood meals aggressively: warm temperatures accelerate mosquito metabolism, increasing the frequency with which females must feed; sunlight drives human and animal activity outdoors, increasing exposure; and the abundance of standing water provides the breeding habitat into which each successfully fed female can deposit hundreds of eggs. Loki Synman, curator for invertebrate zoology at the Royal Alberta Museum, described the cycle precisely: “A sunny period after lots of rain will have very active mosquitoes all looking for a quick blood meal.”<\/p>\n\n\n\n

Jenkins’s warning about the compounding nature of the problem is specifically alarming. “Those mosquitoes that have been activated by the rainfalls, they’re collecting blood meals, and using the protein to lay more eggs,” he said in early July. “Going forward, that can ramp up really, really quickly.” Each generation of successfully breeding females produces hundreds of larvae. Those larvae, hatching in the abundant standing water created by continued rainfall, produce a new generation of adults that then seeks blood meals and lays more eggs. The population has its own momentum now, and it continues as long as warm temperatures, water, and blood meal sources remain available.<\/p>\n\n\n\n

Bug Spray Shortages: When a Nuisance Becomes a Supply Chain Event<\/strong><\/p>\n\n\n\n

The consumer behaviour impact of Edmonton’s mosquito crisis has been one of its most visible and most practically consequential dimensions. Bug spray \u2014 specifically DEET-based insect repellents, which are the most effective available protection against mosquito bites at concentrations of 20 to 30 per cent \u2014 has disappeared from shelves at hardware stores, pharmacies, outdoor retailers, and grocery chains across Edmonton and the surrounding capital region.<\/p>\n\n\n\n

The shortage is not a manufacturing failure. Supply chains for insect repellent are robust in normal years, calibrated to typical seasonal demand patterns in which Alberta’s mosquito season is a manageable annual nuisance rather than a historically exceptional event. The scale of 2026’s demand spike \u2014 driven by tens of thousands of Edmonton residents simultaneously concluding that they need to purchase repellent that, in lighter mosquito years, they might simply not have bothered with \u2014 has outpaced retail inventory in a way that routine restocking cycles cannot immediately resolve. Retailers can order more product, and it will arrive, but the lag between a demand spike and the supply chain’s ability to fully respond creates the temporary shortages that are driving Edmontonians to social media in search of where to find remaining stock.<\/p>\n\n\n\n

The shortage has also produced a secondary market in tips, substitutes, and protective strategies circulating on Edmonton’s social media feeds. Covering exposed skin with long-sleeved clothing \u2014 recommended by Jenkins as one of the most effective non-chemical protections \u2014 has the side effect of making Edmonton’s summer feel even more miserable than the bites themselves, given that July temperatures in the capital regularly reach the mid-to-high 20s Celsius. Avoiding the outdoors at dawn and dusk, when mosquitoes are most active, has been widely repeated as advice \u2014 though for people who commute, exercise, or simply live normal lives, “avoid being outside between 5 and 9 a.m. and 6 and 10 p.m.” is easier to say than to implement over the course of an entire summer.<\/p>\n\n\n\n

Skeeter Syndrome: When a Bug Bite Becomes a Medical Condition<\/strong><\/p>\n\n\n\n

One of the more alarming dimensions of Edmonton’s mosquito crisis is the emergence of “skeeter syndrome” as a documented medical concern among Albertans experiencing the population explosion. The term, which sounds colloquial but describes a genuine immunological condition, refers to a hypersensitive allergic reaction to the saliva that mosquitoes inject into their hosts when feeding. In people with the condition, what would ordinarily be a mildly itchy bump becomes a dramatically larger, more inflamed, and more painful reaction \u2014 welts that can be several centimetres in diameter, hot to the touch, producing significant swelling around the affected area and sometimes accompanied by fever, swollen lymph nodes, and other systemic symptoms.<\/p>\n\n\n\n

Skeeter syndrome is not new, but it is being diagnosed in increasing numbers in Alberta this summer \u2014 a direct function of the sheer volume of bites that residents are experiencing. Someone who is bitten once or twice in a normal summer and never develops the condition may be bitten dozens of times in a single evening in the summer of 2026, dramatically increasing both the cumulative allergenic load and the likelihood that a previously unrecognised sensitivity will manifest as skeeter syndrome. Medical practitioners are seeing cases, and Alberta Health Services has been noting the condition in public health communications about the mosquito crisis.<\/p>\n\n\n\n

The condition is managed primarily through antihistamines for mild cases, with topical corticosteroids for more significant local reactions and in some cases medical evaluation for systemic symptoms. It is not life-threatening in the great majority of cases, but it is significantly more disruptive than a normal mosquito bite and, in a summer of record exposure, it affects a meaningful number of the residents being bitten repeatedly.<\/p>\n\n\n\n

West Nile Virus: The Health Stakes Escalate<\/strong><\/p>\n\n\n\n

If skeeter syndrome raises the health stakes of Edmonton’s mosquito crisis above the level of a mere inconvenience, the detection of West Nile virus in Calgary mosquitoes has escalated those stakes further.<\/p>\n\n\n\n

Researchers at the University of Calgary announced on July 23, 2026 \u2014 the same week that Edmonton’s record population figures were being reported \u2014 that West Nile virus had been detected in Calgary mosquitoes. Dr. John Soghigian, an associate professor in the University of Calgary’s faculty of veterinary medicine, described the timing as “the earliest detection we’ve seen in Calgary in recent years.” Primary Care Alberta confirmed one travel-related case of human West Nile virus had been reported in the province at the time of the announcement \u2014 a baseline that Soghigian and his colleagues are monitoring closely given the expanded mosquito population.<\/p>\n\n\n\n

West Nile virus circulates between birds and mosquitoes \u2014 birds are the reservoir host, and certain mosquito species (particularly Culex pipiens, a newcomer to Edmonton that first appeared in 2020 and has ramped up dramatically in numbers since) are the bridge vector that can transmit the virus from infected birds to humans. Dr. Soghigian’s framing was precise and important: “What that means is other mosquitoes could become infected, who could then bite people and then that could lead to disease transmission.”<\/p>\n\n\n\n

The public health consequence of this biological sequence is that West Nile virus infection is a real, present risk in Alberta in the summer of 2026, not a theoretical future concern. The vast majority of people infected with West Nile virus \u2014 up to 80 per cent, according to the Public Health Agency of Canada \u2014 will have no symptoms at all, or only mild flu-like symptoms that resolve without treatment. But approximately 20 per cent will develop symptoms including fever, headache, body aches, joint pain, vomiting, diarrhea, or rash \u2014 and a small proportion, primarily older adults or people with compromised immune systems, will develop the severe neurological form of the disease (West Nile encephalitis or meningitis) that can be life-threatening. There is no specific treatment for West Nile virus and no vaccine for humans. Prevention \u2014 reducing mosquito exposure through repellent, clothing, and avoiding peak activity times \u2014 is the primary tool available to individuals.<\/p>\n\n\n\n

Edmonton’s record mosquito population, which includes Culex pipiens among its 30 identified species, creates the conditions for significantly elevated West Nile transmission risk if the virus becomes established in the local bird-mosquito cycle. The city’s larviciding programme is specifically designed to reduce this risk by targeting Culex populations in their preferred breeding habitat \u2014 stagnant, predator-free water in gutters and storm drains. But the scale of the population and the breadth of the breeding habitat created by 2026’s record rainfall makes the control programme’s task significantly more difficult than in a normal year.<\/p>\n\n\n\n

When Will It End? The Timeline Edmonton Residents Are Waiting For<\/strong><\/p>\n\n\n\n

The question that every mosquito-weary Edmonton resident is asking \u2014 “when does this end?” \u2014 has an honest answer from Mike Jenkins that is somewhat comforting and somewhat alarming in equal measure.<\/p>\n\n\n\n

The current peak, according to Jenkins and CTV News’s reporting on July 24-25, may be or may have already been the season’s pinnacle. The population builds, reaches a peak, and then declines as the summer progresses \u2014 the biological clock of mosquito generations means that each successive generation is somewhat smaller than the peak generation, assuming that new hatching events (driven by additional rainfall) do not restart the cycle. Jenkins has indicated that as temperatures begin their late-summer decline and standing water evaporates or drains, the population will decrease. The question is how quickly.<\/p>\n\n\n\n

The honest answer is: not immediately, and not as quickly as anyone in Edmonton would like. The enormous egg deposits laid by the current record adult population will hatch in the next rainfall events \u2014 meaning that any significant rain in the coming weeks will trigger a fresh hatching event, potentially partially sustaining the population even as the current generation ages and dies. The floodwater species that dominate Edmonton’s mosquito fauna typically have flight seasons extending into August before populations begin their sustained decline as cooler temperatures arrive in late August and September.<\/p>\n\n\n\n

For Edmontonians hoping for relief before August, the most useful advice from city scientists remains: use DEET-based repellent when it is available, wear long sleeves and light-coloured clothing when outdoors during peak activity times, avoid standing water around your property, and keep window screens in good repair. The city is continuing its larviciding programme in priority areas \u2014 and homeowners can eliminate backyard breeding sites by regularly emptying anything that holds standing water, from flower pots and bird baths to clogged gutters and unused containers.<\/p>\n\n\n\n

For everyone else in Edmonton \u2014 the roughly 900,000 people who just want to go outside without being eaten alive \u2014 the summer of 2026 will eventually end. It will end in September, when the cold arrives and the mosquitoes, like the record rainfall that created them, finally recede into the history books alongside 1990 and the 1980s and all the other summers that Mike Jenkins has been measuring for decades. Until then, the advice is simple, practical, and deeply unsatisfying: cover up, spray down, and wait.<\/p>\n\n\n\n

Sources<\/strong><\/p>\n\n\n\n

    \n
  1. CBC News \u2014 Edmonton Has 15 Times More Mosquitoes Now Than at Same Time Last Year, City Scientist Says (July 24-25, 2026):
    https:\/\/www.cbc.ca\/news\/canada\/edmonton\/edmonton-mosquito-population-repellent-9.7283473<\/a><\/li>\n\n\n\n
  2. CBC News \u2014 Blame It on the Rain: Record Downpour in Edmonton Will Bring Monsoon of Mosquitoes (July 1, 2026):
    https:\/\/www.cbc.ca\/news\/canada\/edmonton\/alberta-rain-mosquito-bites-population-9.7252480<\/a><\/li>\n\n\n\n
  3. CBC News \u2014 West Nile Virus Detected in Calgary Mosquitoes Earlier Than Usual This Year (July 23, 2026):
    https:\/\/www.cbc.ca\/news\/canada\/calgary\/west-nile-calgary-mosquitoes-9.7281079<\/a><\/li>\n\n\n\n
  4. CTV News Edmonton \u2014 Edmonton Seeing Record Mosquito Levels (July 24, 2026):
    https:\/\/www.ctvnews.ca\/edmonton\/video\/2026\/07\/24\/edmonton-seeing-record-mosquito-levels\/<\/a><\/li>\n\n\n\n
  5. CTV News Edmonton \u2014 Edmonton’s Mosquito Population Has Broken Records; When Will They Go Dormant? (July 24-25, 2026):
    https:\/\/www.ctvnews.ca\/edmonton\/article\/edmontons-mosquito-population-has-broken-records-when-will-they-go-dormant\/<\/a><\/li>\n\n\n\n
  6. Global News \u2014 Alberta Entering Prolonged Mosquito Season Not Seen in Decades: ‘Eaten Alive’ (July 2026):
    https:\/\/globalnews.ca\/news\/11965577\/alberta-mosquitos-summer-2026\/<\/a><\/li>\n\n\n\n
  7. Global News \u2014 Edmonton Mosquito Number Rising After Rainy Weekend \u2014 and More Expected (June 24-25, 2026):
    https:\/\/globalnews.ca\/news\/11937583\/edmonton-mosquitoes-june-2026\/<\/a><\/li>\n\n\n\n
  8. St. Albert Gazette \u2014 More Mosquitoes to Come, Says Edmonton Bug Guy (June 25, 2026):
    https:\/\/www.stalbertgazette.com\/local-news\/more-mosquitoes-to-come-says-edmonton-bug-guy-12473170<\/a><\/li>\n\n\n\n
  9. Public Health Agency of Canada \u2014 West Nile Virus: Fact Sheet:
    https:\/\/www.canada.ca\/en\/public-health\/services\/diseases\/west-nile-virus.html<\/a><\/li>\n\n\n\n
  10. City of Edmonton \u2014 Mosquito Management Program (Larviciding and Monitoring):
    https:\/\/www.edmonton.ca\/programs_services\/pests\/mosquitoes<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    A city scientist who got a mosquito bite on his tongue the last time it was this bad. Traps that went from 5 mosquitoes in May to 535 in three weeks. 30 species identified and swarming. Skeeter syndrome sending Albertans to hospital. West Nile virus detected in Calgary earlier than ever. And a simple, urgent … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-81","post","type-post","status-publish","format-standard","hentry","category-trending-posts"],"_links":{"self":[{"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/posts\/81","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/comments?post=81"}],"version-history":[{"count":1,"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/posts\/81\/revisions"}],"predecessor-version":[{"id":82,"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/posts\/81\/revisions\/82"}],"wp:attachment":[{"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/media?parent=81"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/categories?post=81"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/njsr.com.ng\/trendsphere\/wp-json\/wp\/v2\/tags?post=81"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}