Extreme Heat Wave to Scorch Southwest This Week

National Weather Service issues warnings for California, Arizona, and Nevada

Mar. 15, 2026 at 10:35am

Got story updates? Submit your updates here. ›

The National Weather Service has issued an extreme heat watch for parts of California, Arizona, and Nevada this week, warning of "dangerously hot conditions" and record-breaking temperatures up to 30 degrees above average. Temperatures are expected to reach as high as 110°F in some areas, raising concerns about heat-related illnesses, especially for vulnerable populations.

Why it matters

Extreme heat waves can pose serious health risks, particularly for the elderly, young children, and those without access to air conditioning. This event highlights the growing threat of climate change-fueled extreme weather in the Southwest region.

The details

The NWS has warned that parts of California, including the Coachella Valley, San Diego county deserts, and San Gorgonio Pass, could see temperatures between 105°F and 110°F from Wednesday through Friday. Other areas of California, Arizona, and Nevada are also expected to experience temperatures ranging from 100°F to 109°F during this time period. The NWS has advised residents and visitors to take precautions, stay hydrated, limit outdoor activities, and never leave children or pets unattended in vehicles.

  • The extreme heat watch is in effect from Monday, March 16 through Sunday, March 22.
  • The hottest temperatures are expected to peak on Friday and Saturday.

The players

National Weather Service (NWS)

The National Weather Service is the primary source of weather data, forecasts and warnings for the United States.

Got photos? Submit your photos here. ›

What’s next

The NWS will continue to monitor the situation and provide updates on the extreme heat throughout the week. Local authorities may issue additional guidance or emergency measures if the temperatures become dangerously high.

The takeaway

This extreme heat wave underscores the need for communities in the Southwest to prepare for and adapt to the growing threat of climate change-driven extreme weather events. Ensuring access to cooling centers, checking on vulnerable residents, and educating the public on heat safety measures will be crucial in the coming days.