Mosquito control districts in the U.S. work with state public health departments to ensure that if West Nile virus is detected, the public is notified and efforts are made to control the mosquito population. Nevertheless, it’s still important to use some common sense practices for keeping mosquitoes out of your home and reduce the number of bites that you get. No one likes mosquito bites, right? Clear standing water, such as that found in old tires and outdoor potted plant saucers, use screens on windows and use mosquito repellant, especially at dawn and dusk, even if there is no current outbreak.
Check out the CDC’s recommendations here: http://www.cdc.gov/westnile/prevention/index.html