Extreme Heat Warning in Effect for Pasadena as Valley Temperatures Climb Toward 105 Degrees

In a bulletin issued at 3:07 a.m. Sunday, the National Weather Service issued an extreme heat warning for Pasadena and the greater San Gabriel Valley, forecasting dangerously high temperatures between 95 and 105 degrees through 9 p.m. Sunday.

The warning cites elevated risk of heat-related illness, especially for children, older adults, outdoor workers, and residents without access to air conditioning. Overnight lows are expected to remain warm, with temperatures around 69 degrees Saturday night and 67 degrees Sunday night.

Sunday’s forecast calls for sunny and hot conditions with a high near 97 in Pasadena. Winds will be light, shifting from southwest to south-southwest at 5 to 10 mph in the morning, and calming again in the evening.

The advisory covers a broad swath of Southern California, including Los Angeles County’s San Gabriel Valley, with Pasadena specifically named among affected cities. Officials urge residents to stay hydrated, avoid direct sun exposure, and check on vulnerable neighbors.

“Car interiors will reach lethal temperatures in a matter of minutes,” the advisory warns, emphasizing the danger of leaving children or pets unattended in vehicles.

The Occupational Safety and Health Administration recommends frequent rest breaks in shaded or air-conditioned environments for those working outdoors. Symptoms of heat exhaustion and heat stroke should be treated as emergencies, and residents are advised to call 911 if someone is overcome by heat.