West Nile virus is back on the radar in Dallas, and that means the spray trucks are rolling overnight through parts of Oak Cliff and Red Bird after mosquito samples in the area tested positive, according to city notices. Crews are set to apply insecticide between 9 p.m. and 5 a.m. on selected nights this week, and residents in the spray zones are being urged to stay indoors while the trucks pass. Health officials say the effort is part of routine seasonal surveillance and targeted control meant to knock down mosquito populations that can carry the virus.
Spray Zones And Schedule
The treatment map zeroes in on Central and West Oak Cliff, roughly framed by Whitewood Drive, Periwinkle Drive, Rugged Drive, and Myrtlewood Drive, along with a Red Bird zone between Midvale Drive, Woodshire Drive, R.L. Thornton Freeway, and Seaside Drive, The Dallas Morning News reported. Spraying in these neighborhoods is scheduled for Wednesday and Thursday nights from 9 p.m. to 5 a.m., and anyone who ends up in the path of the mist is advised to wash exposed skin with soap and water.
What Officials Are Saying
In a news release, the City of Dallas said the insecticide in use is approved by the Environmental Protection Agency and “breaks down quickly in the presence of sunlight” with no residual effect. The city is reminding residents to keep vehicle windows rolled up as the trucks pass, report standing water to 3‑1‑1, and contact the city to be added to the Do Not Spray list if they need to opt out.
Regional Context
The Texas Department of State Health Services confirmed the first human West Nile case of 2026 in the state on Tuesday, a Harris County resident diagnosed with neuroinvasive disease. The agency noted that most infections cause no symptoms, while a smaller share lead to fever or more serious neurologic illness. DSHS is urging Texans to remove standing water around homes and use repellents as mosquito season ramps up.
Across the Metroplex, Tarrant County Public Health reported that traps in Fort Worth and Grand Prairie turned up positive for West Nile last Thursday, signaling an early start to the regional season and prompting targeted treatments in those areas. The county noted that local health departments typically initiate ground spraying after laboratory confirmation of positive mosquito pools.
How Residents Can Protect Themselves
Officials are pushing familiar but effective steps: dump standing water on private property, use EPA‑registered insect repellents, wear long sleeves and long pants at dawn and dusk, and keep windows and door screens in good repair. For detailed guidance on prevention, symptoms, and when to call a doctor, the CDC and state health agencies offer up-to-date resources.
