Bay Area Braces for Nearly Week-Long Heat Wave

Temperatures expected to reach upper 80s and mid 90s across the region.

Mar. 15, 2026 at 5:21pm by Ben Kaplan

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The National Weather Service has issued a heat advisory for the Bay Area, warning of above-normal temperatures that will last nearly a week. Coastal areas are expected to see temperatures in the 80s, while interior regions could reach the upper 80s and mid 90s.

Why it matters

Heat waves can pose serious health risks, especially for vulnerable populations. The prolonged nature of this event raises concerns about potential power outages, strain on the electrical grid, and increased risk of wildfires.

The details

The heat advisory begins on Monday at 10 a.m. and is expected to last until Friday at 8 p.m. San Francisco is forecasted to reach a high of 87 degrees, while other cities like Concord, Oakland, Fremont, and San Jose could see temperatures climb into the 90s.

  • The heat advisory begins on Monday, March 18, 2026 at 10 a.m.
  • Temperatures are expected to peak on Tuesday, March 19, 2026.
  • The heat advisory is scheduled to end on Friday, March 22, 2026 at 8 p.m.

The players

National Weather Service

The federal agency responsible for weather forecasting and issuing weather-related advisories and warnings.

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What’s next

Residents are advised to stay hydrated, limit time outdoors, and check on vulnerable family members and neighbors during the heat wave.

The takeaway

This prolonged heat event underscores the need for Bay Area communities to be prepared for the impacts of climate change, including more frequent and severe heat waves that can strain infrastructure and pose public health risks.