Broader Southern California Coverage Heat Risk

Extreme Heat Warnings Blanket Southern California as October Heat Wave Continues

A prolonged early-October heat wave continues to grip Southern California, with Extreme Heat Warnings in effect across large portions of the region through Thursday or Friday depending on location.

Key areas and timing:

• Los Angeles & Ventura Counties (coasts and valleys): Warning through 8 p.m. Thursday. Highs 90–100°F at the coast, up to 106°F in the valleys.
• Inland Empire / San Bernardino & Riverside Valleys: Highs upper 90s to 105°F.
• Orange County inland areas & San Diego County valleys/coastal zones: Similar dangerous heat through Thursday.
• Coachella Valley, San Diego County deserts, San Gorgonio Pass: Extreme Heat Warning from 10 a.m. Wednesday through 8 p.m. Friday, with highs 104–108°F.
• Death Valley National Park (elevations below 2,000 feet): Warning continues through 8 p.m. Friday, with highs near 110°F and overnight lows around 85°F.

Temperatures are running well above seasonal normals, and warm nights are limiting recovery time. Major Heat Risk is expected in many locations.

Heat safety priorities right now:

• Limit outdoor exertion during peak afternoon hours.
• Prioritize hydration and cooling.
• Check on neighbors, especially older adults and those without air conditioning.
• Athletes and outdoor workers: Have a cooling plan ready. Know the early signs of exertional heat stroke.

Remember the critical rule for suspected heat stroke: Cool the athlete or worker first, then transport. Cold-water immersion saves lives.

Relief is expected this weekend as a pattern shift brings cooler temperatures, but conditions remain dangerous through the end of the week. Monitor local National Weather Service updates and act early to stay safe.