Extreme heat begins today in SLO County. What to know

A heat advisory takes effect Tuesday across San Luis Obispo County and runs through Thursday, with monsoon moisture expected to push inland temperatures past 100 degrees. Officials are urging residents to take precautions as a large mass of high pressure builds over the western United States.

FULL STORY: ‘Heat dome’ could bring extreme temperatures to SLO County. Here’s when, how hot

Here are key takeaways:

• When and where: The extreme heat watch runs Tuesday through Thursday. A new heat advisory also hung over inland San Luis Obispo County through Thursday, warning of temperatures of up to 110 degrees, with hottest temps on Wednesday and over interior areas. Inland areas such as Paso Robles will see highs above 100 degrees, while San Luis Obispo and locations closer to the coast will reach the upper 80s.
• What’s driving it: McClatchy meteorologist Sean Macaday said another “heat dome” is taking shape across the western and central United States, describing it as a self-reinforcing mass of high pressure in the upper atmosphere that dominates the sky for thousands of miles.
• In Macaday’s words: “Just as a heat dome brought record-hot temps to the eastern U.S. last week, this heat dome — on our side of the country — will bring hot temps our way.”
• How to stay safe: The SLO County Office of Emergency Services urged residents to take breaks in the shade or air conditioning, stay hydrated and check in on vulnerable neighbors and pets during periods of extreme heat.

The summary points above were compiled with the help of AI tools and edited by journalists. The full story in the link at top was reported, written and edited entirely by journalists.

This story was originally published July 14, 2026 at 9:00 AM.