highway. reporter: with more hot weather to come, firefighters in washington are gaining ground but worried, too. neal karlinsky, abc news, seattle. two small planes took to the skies over dallas overnight spraying insecticide against an epidemic of west nile virus. they re targeting mosquitoes carrying the virus. it already killed 10 people in the area. at least 230 infected people have gotten sick so far this year. the early spring and hot summer helped those mosquitoes thrive. now this is the first aerial spraying in dlas ogh 1966. 45 years. interesting tidbit. they re saying one of the real problems with mosquitoes, breeding and nesting grounds that are coming from abandoned swimming pools in foreclosed homes. of s wat cf1 and not just in texas, a real problem with mosquito breeding. 49,000 acres, spraying, a lot of folks worried about those