Austin public health officials issued a notice to the public July 5 urging residents to protect themselves from mosquitoes during increased rainfall and moisture that could lead to heightened risk of diseases.

Mosquitoes may carry diseases that contribute to infections such as Zika, West Nile, dengue fever, encephalitis and canine heartworm. 

“This has been a wetter and cooler summer so far, a combination which mosquitoes thrive in,” Austin Public Health Director Adrienne Sturrup said in a statement. “Let’s do what we know works to stay safe.”

What you should know

Health officials are reminding residents to follow the “Four Ds” to help prevent mosquito bites and reduce the risk of infection:

• Dusk and dawn: Mosquitoes are most active during early morning and evening hours. Limit outdoor activity during these times when possible.
• Dress: When outside, wear long sleeves and pants. Light-colored, loose-fitting clothing is recommended. Mosquito-repellent clothing is also available.
• DEET: Use insect repellents that contain DEET and follow the product label instructions. Apply repellent to exposed skin and clothing. A full list of approved repellents is available from the Environmental Protection Agency.
• Drain: Eliminate standing water around your home to reduce mosquito breeding sites. Common culprits include clogged gutters, birdbaths, old tires and flowerpots.

Some context

The Texas Department of State Health Services, or DSHS, recently announced the state’s first West Nile virus case of 2025 in Brazos County, east of Austin near College Station.

Last year, 101 mosquito pools in the Austin area tested positive for West Nile virus, according to Austin Public Health. Preliminary data from the DSHS also identified 33 human cases in Travis County, including two deaths.

Austin health officials encourage residents to report mosquito-related concerns by calling 311 to help protect the community.

Find additional resources regarding mosquitoes at www.austintexas.gov/mosquito.