If you're planning an outdoor workout in Los Angeles today, you might want to reconsider. Or at least have your will updated.
Why today is absolutely not the day:
- Extreme Heat Warning: It's not just warm, it's dangerously hot. An Excessive Heat Warning is plastered across much of Los Angeles County, including our beloved Malibu Coast and Santa Monica Mountains, until Friday at 8 PM. We're talking temperatures pushing into the 100s, possibly 112 degrees in the San Fernando Valley. Your body isn't built to thrive in that kind of oven.
- Red Flag Warning: On top of the heat, we've got a Red Flag Warning for high fire risk until 6 PM tonight for pretty much all of LA County (Antelope Valley, you're off the hook for this one). That means gusty winds up to 35-40 mph, bone-dry vegetation, and conditions ripe for wildfires to rip through areas like the Angeles National Forest. Don't be the idiot who sparks the next disaster.
- Ozone Air Quality Alert: Just when you thought your lungs couldn't take more, the South Coast AQMD has issued an Air Quality Alert for harmful levels of ozone, or smog, from Monday right through Friday evening. You'll feel it in your chest, especially in the afternoons. Good luck getting a decent breath when the air itself is trying to give you an asthma attack.
Today's Vitals (August 26, 2026)
| Metric | Value |
|---|---|
| Temperature | 16.5°C (61.7°F) |
| Conditions | Mainly Clear |
| Air Quality Index | 18 (Good) |
| Dominant Pollutant | Ozone/Other |
| Pollen Level | Moderate |
Seriously, Stay Indoors if You Can.
The combination of triple-digit heat and a Red Flag Warning means a significant risk of large, rapidly spreading fires. The Angeles National Forest is already at an "Extreme" Fire Danger Level, with some roads like Chaney Trail Road and parts of Angeles Crest Highway closed. Don't even think about heading up there for a "quick trail run." You'll be breathing fire, literally.
Ozone is the Sneaky Killer.
While the general AQI might look "Good" at 18, don't let that fool you. The Air Quality Alert for harmful levels of ozone means trouble, particularly in the afternoon and early evening. Ozone can inflame your airways, trigger asthma, and generally make you feel like crap. If you absolutely must run, do it at dawn, keep it short, and avoid high-traffic areas or anywhere close to industry.
Heat Exhaustion is No Joke.
With the current heat wave, even coastal areas and the Santa Monica Mountains are under an Extreme Heat Warning. If you're out there, even for a short walk around Griffith Park, load up on water before you go, wear light, loose clothing, and seek shade whenever possible. Know the signs of heat exhaustion: dizziness, nausea, excessive sweating, rapid pulse. If you feel any of it, stop immediately and get somewhere cool. Hydrate, then hydrate some more. And for the love of all that is holy, check on your elderly neighbors and anyone else who might be vulnerable. The city has cooling centers open if you need a place to escape the heat.
Look, I get it. We runners are stubborn. But today, the smart play is the treadmill, the pool, or that neglected yoga mat in your closet. Your lungs, joints, and frankly, the entire city, will thank you.
Data grounded with National Weather Service, AccuWeather, CAL FIRE, and local news sources from August 25-26, 2026.