If you're looking to hit the pavement or trails in Houston today, you might want to reconsider that whole 'fresh air' thing, and definitely that 'not dying of heatstroke' thing.
- The air quality is officially "Unhealthy for Sensitive Groups" due to fine particulate matter (PM2.5), meaning your lungs will be working overtime just to breathe.
- Houston's notorious summer heat and humidity are back with a vengeance, driving the "feels like" temperature into dangerous territory, potentially hitting 105-110°F today.
- Good luck finding an uninterrupted run: parts of the White Oak Bayou Greenway are still choked with long-term construction closures.
Environmental Breakdown
Pollen Report
| Pollen Type | Level |
|---|---|
| Overall | Moderate |
Another glorious day for your allergies, if you're into that sort of thing. "Moderate" pollen might not sound like much, but combine it with everything else Houston is throwing at you, and it's just another irritant.
Air Quality Index (AQI)
Today's AQI sits at a lovely 103, with PM2.5 as the dominant pollutant. What does that mean for you? It means the air quality is considered "Unhealthy for Sensitive Groups." So, if you've got asthma, emphysema, or just lungs that aren't made of steel, expect some irritation, coughing, or difficulty breathing. The petrochemical complex along the Ship Channel and our car-dependent sprawl are doing their part to keep those PM2.5 levels up.
Air Quality Alert: With an AQI of 103 (Unhealthy for Sensitive Groups) from PM2.5, individuals with respiratory issues, the elderly, and children should limit prolonged outdoor exertion. Consider moving your workout indoors today.
Weather Woes
It's "Mainly Clear" at 28.2°C (around 83°F) right now, but don't let that fool you into thinking it's pleasant. The humidity is through the roof, making it feel more like 88°F already. Forecasters are calling for scattered thunderstorms later today, but before that, expect the heat index to soar to a truly dangerous 105-110°F. Doctors consistently warn that Houston's humidity is often more dangerous than just high temperatures alone, because it prevents your sweat from actually cooling you down. Your body essentially cooks itself.
Extreme Heat and Humidity Danger: Heat index values could reach 105-110°F today. This is prime heat exhaustion and heatstroke territory. Symptoms like dizziness, nausea, headaches, and confusion mean you need to stop immediately and get to a cool place. This isn't a game.
Local Workout Hazards
Trail Closures and Construction
If you were planning a nice long run along the White Oak Bayou Greenway, you're going to hit some snags. The Little White Oak Bayou Trail, specifically between Houston Avenue and the Castillo Community Center, has been shut down since January 2026 for IH-45/I-10 connector ramp construction and isn't expected to reopen until 2028. There are detours, but they usually involve less pleasant, less safe street running. Meanwhile, other stretches of White Oak Bayou near North Shepherd have also seen weekday closures for construction. And don't even get me started on the ongoing saga that is the Brays Bayou Trail closure at Spur 5 due to the never-ending SH 35 expansion.
Construction Navigation: If you're hitting the White Oak Bayou Greenway, plan your route carefully. Expect detours and be prepared to navigate city streets. Seriously, check TranStar before you head out, or you'll be doing an unscheduled urban adventure.
Events
There's a "Popsicle Dash" happening at Karbach Brewing Co. this morning, from 7:30 AM to 10:30 AM. Good luck with that in this humidity, folks. If you're not participating, expect some extra foot traffic and potential minor road impacts around that area during those hours.
Data grounded with Houston Public Media and Click2Houston from July 10-11, 2026.