The timing for the emergence of the next crop of mosquitoes is 5 to 10 days after the running water recedes and stagnant puddles form. This is a difficult question with no single, correct answer. Eliminating mosquito breeding sites is always desirable and is usually accomplished by filling or draining standing water sources. However, with such an over abundance of breeding sites, it may not be possible to eliminate enough standing water to make a difference in the mosquito population, especially in the next week when other, higher priority activities are commanding the attention of city officials and homeowners impacted by the flood. And because mosquitoes can migrate several miles after they emerge from their breeding site, a wide area puddle elimination project would be required.
Pesticides are available for treating standing water for mosquitoes.
However, for the same reasons as just mentioned, it may not be practical to begin a larviciding effort that can treat only a small portion of the total number of breeding sites. An area wide abatement program might make a noticeable difference, but few municipalities or counties will have the resources and experience to accomplish this. Weather, rather than management activities, may be the deciding factor in how bad the mosquitoes get. As with so many things right now, sunshine and gentle breezes would be greatly appreciated. Fogging for adult mosquitoes is possible, but again, probably not practical nor extremely effective.