Health officials in San Antonio, Texas, are raising the alarm after the San Antonio Metropolitan Health District detected West Nile virus in a mosquito trap in early May — months earlier than historically expected — according to a report published June 9, 2026. The early detection has prompted city and county officials to urge residents to take precautions as rainfall, high temperatures, and humidity create prime conditions for mosquito breeding and virus transmission.
The positive mosquito pool was located near the intersection of Hillcrest Drive and Bandera Road in northwest San Antonio. Metro Health workers responded by fogging the area and treating standing water. No confirmed human cases of West Nile virus have been reported in Bexar County in 2026.
