For families spending late-summer evenings in the backyard, walking neighborhood trails or watching children play outside, mosquitoes can feel like little more than an unavoidable Texas nuisance. Hays County officials are using World Mosquito Day to remind residents that there is also a public health reason to pay attention.

The Hays County Commissioners Court has proclaimed Aug. 20, 2026, as World Mosquito Day, recognizing both the health risks associated with mosquito-borne diseases and the local employees who work throughout the year to monitor mosquito activity.

For residents of Sunset Oaks, the message is a practical one: reducing mosquito exposure begins close to home, and small actions taken across a neighborhood can collectively make a difference.

Hays County Has Monitored Mosquitoes for More Than Two Decades

Hays County Development Services has monitored local mosquito populations since 2003. Today, its Mosquito Surveillance Program conducts standardized sampling, disease surveillance and public education throughout the county.

That work is coordinated with the Hays County Health Department and the Texas Department of State Health Services, helping health officials identify mosquito-borne disease activity and take steps aimed at reducing transmission risks.

The surveillance matters because mosquitoes can carry illnesses including West Nile virus, which the Centers for Disease Control and Prevention identifies as the leading cause of mosquito-borne disease in the contiguous United States. West Nile is most commonly transmitted to people through the bite of an infected mosquito, with infections generally occurring during mosquito season from summer into fall.

What Residents Should Know About West Nile Virus

Most people infected with West Nile virus never realize it. According to the CDC, about 80% of infected people do not develop symptoms.

About 20% develop an illness that can include fever, headache, body aches, joint pain, vomiting, diarrhea or a rash. Most people with these milder symptoms recover completely, although fatigue and weakness can sometimes continue for weeks or months.

Less than 1% of infected people develop severe disease affecting the central nervous system, including conditions such as encephalitis or meningitis. The CDC advises seeking immediate medical attention for symptoms such as high fever, neck stiffness, muscle weakness, confusion or tremors. Older adults and people with certain medical conditions or weakened immune systems face a higher risk of severe illness.

There is currently no licensed vaccine or medication to prevent West Nile virus disease in people, making prevention of mosquito bites especially important.

The Three D's: Drain, Dress and Defend

Hays County’s World Mosquito Day message gives residents three straightforward reminders: Drain, Dress and Defend.

Drain standing water. Mosquitoes need water to reproduce, and the CDC recommends checking around homes at least once a week for containers that can collect it. Buckets, planters, toys, birdbaths, flowerpots, trash containers and other outdoor items can all become breeding locations if water remains inside them. Residents should empty, cover or discard containers that hold water whenever possible.

That makes mosquito prevention a particularly neighborhood-centered effort. One household can clear its yard, but reducing breeding areas across an entire street or subdivision can have a broader impact. For Sunset Oakshomeowners, a quick weekly walk around the yard after rainfall can be one of the simplest places to start.

Dress to protect. The CDC recommends wearing long, loose-fitting shirts and pants when practical, particularly when mosquito exposure is likely. Residents can also treat clothing and outdoor gear with products containing 0.5% permethrin or purchase pretreated clothing; permethrin should not be applied directly to skin.

Defend with repellent. CDC guidance recommends EPA-registered insect repellents containing active ingredients such as DEET, picaridin, IR3535, oil of lemon eucalyptus, para-menthane-diol or 2-undecanone. When used according to their labels, EPA-registered repellents are considered safe and effective, including for pregnant and breastfeeding women, although some ingredients have age restrictions for young children.

Residents can also help keep mosquitoes outdoors by maintaining window and door screens and repairing damaged screening around the home.

Why Mosquito Surveillance Matters Close to Home

Mosquito surveillance may happen largely out of public view, but the information gathered can give health agencies an early indication of disease activity in an area.

Sampling mosquito populations, testing for disease and monitoring trends allow local and state agencies to better understand where mosquito-borne illnesses may be circulating. Public education then adds another layer of protection by helping residents reduce breeding locations and avoid bites.

That partnership between government surveillance and household prevention is especially important because mosquito control is difficult to accomplish one property at a time.

For families in Sunset Oaks, World Mosquito Day offers a useful reminder that protecting a neighborhood can begin with something as ordinary as dumping rainwater from a flowerpot, checking the backyard for forgotten containers or reaching for insect repellent before heading outside.

The mosquitoes themselves may be small. The community effort to reduce the health risks they carry does not have to be.

Stay tuned to My Neighborhood News for additional Hays County public health updates, mosquito surveillance information and other news affecting local families and neighborhoods.

By Tiffany Krenek, My Neighborhood News 

Tiffany Krenek has been on the My Neighborhood News team since August 2021. She is passionate about curating and sharing content that enriches the lives of our readers in a personal, meaningful way. A loving mother and wife, Tiffany and her family live in the West Houston/Cypress region.