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NWS Issues Extreme Heat Warning for Southwest California

July 30, 2026 · wweather1 editorial · 2 min read

An Extreme Heat Warning has been issued by NWS Los Angeles/Oxnard CA for a large portion of southwest California. Dangerously hot conditions, with temperatures ranging from 95 to 110 degrees, are expected from Friday morning, July 31, to Sunday evening, August 2.

The National Weather Service (NWS) Los Angeles/Oxnard CA issued an Extreme Heat Warning on July 29 at 1:17 PM PDT. This warning is in effect from 10 AM PDT on Friday, July 31, until 8 PM PDT on Sunday, August 2. Dangerously hot conditions are anticipated, with temperatures forecast to reach between 95 and 110 degrees.

A large portion of southwest California is under this warning, including the coastal ranges, adjacent foothills, and coastal valleys. Specific areas named are Cuyama Valley, Santa Clarita Valley, Southern Salinas Valley, San Luis Obispo County Interior Valleys, San Luis Obispo County Mountains, Santa Ynez Mountains Western Range, Santa Ynez Mountains Eastern Range, Santa Barbara County Interior Mountains, Ventura County Inland Coast, Lake Casitas, and Ojai Valley.

The NWS states that heat related illnesses are expected to increase significantly during this period of extreme heat. Residents should be aware that heat hazards may persist into the following week for certain parts of the region.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids and stay in an air-conditioned room.
• Do not leave young children and pets in unattended vehicles.
• Limit strenuous outdoor activities to early morning or evening hours.
• Check on relatives and neighbors.
📊 The numbers, from wweather1 data
Los Angeles: now +30°, Clear.
The record for this date is +41° (1972).
Three-day forecast: 30 July: +31°/+20° · 31 July: +32°/+18° · 1 August: +36°/+17°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

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📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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