Winnipeg is bracing for more mosquitoes after a wet June created ideal breeding conditions, according to city data released Wednesday.
Mosquito Trap Counts Surge
The city's insect control branch reported that adult mosquito trap counts in late June averaged 50 per trap, up from just 10 per trap during the same period last year. The increase is attributed to above-average rainfall, with Winnipeg recording 120 mm of precipitation in June, nearly double the historical average of 65 mm.
“The standing water from frequent rains has provided abundant breeding sites for mosquitoes,” said David Wade, the city’s insect control supervisor. “We are seeing a significant uptick in both nuisance and potential disease-carrying species.”
Health Risks and Response
The city has ramped up larvicide treatments in standing water areas and increased fogging operations in affected neighborhoods. Health officials warn that the higher mosquito counts could elevate the risk of West Nile virus, though no cases have been reported yet this season.
Residents are advised to wear insect repellent, cover exposed skin, and eliminate standing water on their properties. The city also encourages reporting of stagnant water sites through its 311 service.
Climate Factors
Meteorologists note that the wet June followed a dry spring, creating a rapid transition that favored mosquito breeding. “The combination of warmth and moisture has accelerated the mosquito life cycle,” said Environment Canada climatologist David Phillips. “This pattern is becoming more common with climate change.”
City data shows that mosquito populations typically peak in July and August, so the current surge may persist for weeks. The insect control branch will continue monitoring trap counts and adjust control measures as needed.
