HOUSTON, Texas – A mid-October heat surge and rising ozone levels are prompting new health and safety concerns across Southeast Texas today. The Texas Commission on Environmental Quality (TCEQ) has issued an Ozone Action Day for Houston, Galveston, and Brazoria counties as warm, stagnant air traps pollutants near the surface.
According to the National Weather Service in Houston/Galveston, Wednesday’s sunshine and light winds will create favorable conditions for ozone buildup through the afternoon. Residents are urged to limit car trips, share rides, and avoid idling on roadways such as I-45 and I-10, where traffic congestion can worsen air quality. Sensitive groups—including children, seniors, and those with respiratory conditions—should reduce outdoor activity until air quality improves late Wednesday night.
Despite the pollution alert, much of the week remains dominated by calm, warm weather. Highs will climb into the upper 80s through Thursday under mostly sunny skies. A weak front is expected to bring a 40 percent chance of showers and thunderstorms by Friday, offering minor relief from the week’s heat. The front will also push humidity slightly lower for the weekend, improving air quality but keeping temperatures near seasonal norms.
Looking ahead, forecasters expect highs in the mid- to upper 80s through early next week, with lows in the low 70s. Fall events such as pumpkin patches and outdoor markets should plan for brief showers Friday night, then dry, comfortable conditions for Saturday and Sunday activities.
Five-Day Forecast for Houston, TX:
Wed: 87/68 – Sunny; ozone alert in effect, limit car use.
Thu: 86/72 – Mostly sunny; warm and breezy.
Fri: 86/74 – Partly cloudy; 40% chance of afternoon showers.
Sat: 89/72 – Isolated storms early; turning sunny by afternoon.
Sun: 87/71 – Bright and warm; great for fall outdoor events.
