Alberta is experiencing an unusually long and intense mosquito season, with experts saying conditions of this scale have not been seen in decades. Warm temperatures combined with repeated rainfall have created ideal breeding conditions, leading to a significant increase in mosquito activity across several parts of the province.
Residents have reported unusually large numbers of mosquitoes in neighbourhoods, parks, walking trails, campgrounds and other outdoor areas. Some Albertans say it has become difficult to spend time outside without being repeatedly bitten, with one expert describing the experience as being “eaten alive.”
Experts say Edmonton is experiencing one of its longest periods of sustained mosquito activity in decades. While mosquito populations normally increase following spring rainfall and then decline during prolonged dry weather, continued rain this year has allowed breeding conditions to remain favourable for much longer.
Standing water left behind in roadside ditches, wetlands, stormwater ponds, low-lying areas and residential properties provides ideal locations for mosquitoes to lay their eggs. Warm temperatures can also accelerate the mosquito life cycle, allowing eggs and larvae to develop into biting adults more quickly.
The combination of heat and regular rainfall may result in multiple generations of mosquitoes emerging throughout the summer. Experts warn that if warm and wet conditions continue, elevated mosquito activity could persist into late summer rather than declining after the usual early-season peak.
The increase is affecting outdoor activities across the province. Residents have reported heavier mosquito activity while walking, gardening, camping, golfing and spending time in parks. Mosquitoes are often most active during the early morning and evening, although large populations may remain noticeable throughout the day in shaded and damp areas.
Albertans are advised to use approved insect repellent, wear long-sleeved shirts and long pants when possible, and limit time in areas with heavy mosquito activity. Residents can also help reduce breeding sites by emptying standing water from flowerpots, buckets, children’s toys, birdbaths, clogged gutters and other containers around their homes.
Health officials are reminding residents that some mosquito species can carry West Nile virus. Although the overall risk remains low, people are encouraged to take precautions, particularly when spending extended periods outdoors. Anyone who develops unusual symptoms following mosquito bites should seek medical advice.
Municipal mosquito-control programs continue to monitor mosquito populations and target breeding areas where necessary. However, widespread rainfall can create large numbers of temporary breeding sites, making mosquito activity more difficult to control across the province.
A prolonged period of hot and dry weather could eventually reduce mosquito numbers by drying out breeding areas. However, if Alberta continues to experience warm temperatures and frequent rainfall, residents may have to prepare for persistent mosquito activity through much of the remaining summer.
With conditions not seen in decades, experts are encouraging Albertans to take precautions and prepare for an unusually long and active mosquito season.