Forget a glorious morning run; today in Austin is less about "runner's high" and more about "heat exhaustion risk."
- Dangerous Heat: We're under a Heat Advisory, with afternoon highs projected to hit 104°F and heat indices feeling like 108°F. That's not just "warm," that's "you could land yourself in the ER" hot. Austin Public Health reports hundreds of heat-related emergency room visits since May.
- Trail Chaos Continues: If you thought your usual routes were clear, think again. Key sections of the Ann and Roy Butler Hike-and-Bike Trail and Shoal Creek Trail are still a mess with ongoing construction and reroutes.
- Moderate Pollen: While not the biggest issue today, that "moderate" pollen level is still enough to make your nose itch and eyes water, adding another layer of irritation to your hot workout.
Today's Forecast: Just Plain Brutal
Look, the environmental data says "Clear" and a balmy 27.8°C (82°F) right now, but don't let that fool you. By afternoon, we're talking full-blown Austin summer inferno. The National Weather Service is calling for highs up to 104°F (39°C) with heat index values hitting 108°F (42°C) across the I-35 corridor and parts of the Hill Country. This isn't just a suggestion; it's a serious hazard, with an ongoing Heat Advisory in effect through Wednesday evening, August 26th. For today specifically, expect near-record heat with forecasts hitting 105°F (41°C).
Extreme Heat Advisory in Effect!
Don't be a hero. High temperatures and humidity significantly increase the risk of heat stroke and exhaustion. Plan your outdoor activity for the very early morning or late evening, or better yet, take it inside. Remember the 784 individuals who've already hit the ER this summer for heat-related illness.
Pollen Breakdown (Moderate)
| Pollen Type | Level (Today) |
|---|---|
| Tree | Low |
| Grass | Moderate |
| Ragweed | Low |
| Mold | Moderate |
Yeah, "moderate" isn't "zero." It's still enough to irritate, especially when your lungs are already working overtime in this humidity. The AQI, at least, is a decent 38, so no smoke to worry about.
Navigating Austin's Trails: Expect Detours and Frustration
If your go-to is the Ann and Roy Butler Hike-and-Bike Trail, prepare for some frustration. The north shore, specifically near the Confluence and Austin Rowing Club building, has a long-term reroute in place from June 2026 through March 2027 due to Austin Energy installing underground electrical infrastructure. Trail users should slow down and follow on-site staff instructions. And don't even think about easily crossing I-35 on the east side of Lady Bird Lake; that pedestrian bridge is closed from February 9, 2026, for approximately one year, to build a new bridge as part of the Capital Express Central Project. You'll have to use the west side, or head to South Congress or the new Wishbone Pedestrian Bridge at Pleasant Valley, which thankfully opened back in February. Also, the pedestrian ramp to the Boardwalk along northbound I-35 at Riverside Drive is closed through 2029.
Over on Shoal Creek Trail, it’s still a patchwork. Sections between Shoal Creek Blvd. and the Janet Fish Bridge are closed for maintenance until late August, meaning detours onto the already-busy N. Lamar Blvd. sidewalks. Plus, there's that long-standing landslide damage between 26th-27th Street still causing issues, with a detour along N. Lamar Blvd. While the "Middle Gap" completion was celebrated yesterday, it doesn't mean the whole trail is clear.
Major Trail Sections Closed
Before you head out, check the City of Austin's Parks and Recreation website for current closures, especially around the Ann and Roy Butler Hike-and-Bike Trail and Shoal Creek Trail. You don't want to add a frustrating dead-end to your already-sweaty workout.
Hydration is Non-Negotiable
It’s Austin in August. You know the drill. Drink more water than you think you need, before, during, and after your workout. Electrolytes aren't a luxury; they're survival. Also, that drinking fountain near Zilker Park Sand Volleyball Courts was shut off for repairs last week, so carry your own water.
Data grounded with National Weather Service Austin/San Antonio and AustinTexas.gov from August 25, 2026.