Health departments in Mobile and Baldwin counties have expanded mosquito spraying operations as warm, wet weather fuels a jump in mosquito activity across the region. Crews from both county health departments have been running spray missions on most evenings recently, taking advantage of a stretch of favorable conditions to get ahead of the problem.
A senior public health environmentalist with the Baldwin County department said the team has been spraying every chance it gets, describing recent weeks as a full-on effort to knock back mosquito populations before they become unmanageable. On the Mobile County side, the vector control director explained how the departments track activity in the first place: inspectors regularly check ditches, swampy areas and other standing water for mosquito larvae, while flocks of sentinel chickens are tested periodically for West Nile virus and Eastern equine encephalitis, giving health officials an early warning system for dangerous mosquito-borne illness.
Timing matters too. Around major outdoor gatherings, crews adjust their normal nighttime spraying schedule and instead head out in the early morning hours, finishing before people are out and about with food and drinks. Mobile County is also deploying aircraft to treat marshy coastal areas that trucks can’t reach, targeting salt marsh mosquitoes that can hatch in overwhelming numbers. Officials describe these swarms as intense enough that people can be bitten repeatedly just walking from a house to a car.
Despite the spraying, officials stressed that chemical treatments only kill adult mosquitoes already in the air. Any standing water left sitting in yards, gutters, buckets or old tires will keep producing new generations of larvae regardless of how often spray trucks come through. With Mobile County’s health department alone responsible for monitoring roughly 1,200 square miles, officials said they simply don’t have the staff to go property to property emptying containers, and they’re asking residents to check their own yards regularly for anything holding water.
The push comes amid heightened concern over chikungunya virus, a mosquito-borne illness that has turned up in a handful of Alabama residents who had recently traveled to the Caribbean. Health officials said there’s no evidence yet of local transmission, but the mosquito species capable of spreading the virus are already present in the area, meaning the risk could grow if imported cases aren’t contained. Reducing local mosquito populations is seen as one of the best defenses against the virus gaining a foothold.
Residents are being reminded to use insect repellent, avoid unnecessary time outdoors around dawn and dusk when mosquitoes are most active, and wear long, loose-fitting, light-colored clothing when spending extended time outside this summer.