Thursday, July 23, 2026

Heat Advisory in Effect for Pasadena and Altadena Through Monday

Pasadena and Altadena residents are being urged to take precautions against dangerous heat as a Heat Advisory remains in effect across the region through Monday, July 27

The Los Angeles County Department of Public Health said unusually warm overnight conditions are expected to accompany the daytime heat, offering less relief than usual, through Monday.

Taking precautions is the most important way to prevent heat-related illness such as heat exhaustion, heat stroke and heat cramps, as well as heat-related death, the department said.

“Heat causes more deaths in the U.S. annually than floods, storms, and lightning combined. Those most likely to get ill during the heat include older adults, young children, outdoor workers, athletes, and individuals with chronic medical conditions,” said Muntu Davis, MD, MPH, the Los Angeles County Health Officer, in the release.

“Remember, your safety and the safety of others is crucial during extreme heat conditions. If you or someone around you experiences symptoms of heat stroke or heat exhaustion, such as dizziness, nausea, rapid heartbeat, confusion, or passing out, seek medical help immediately.”

The department advised residents to drink water throughout the day even when not thirsty, to limit time outdoors during the hottest hours, and to wear lightweight, light-colored clothing. It also recommended wearing a hat or using an umbrella and applying sunscreen of SPF 15 or higher.

Residents were reminded never to leave children or pets in a parked vehicle, even briefly and even with windows cracked, and to call 911 if they see a child or pet left alone in a car.

Public Health identified several groups at higher risk, including people who are sick or have chronic conditions, older adults, pregnant women, young children, people who live alone, pets, outdoor workers and athletes, and anyone without air conditioning. The department urged residents to check on vulnerable neighbors during the advisory.

The department said 911 should be called immediately for anyone showing signs of serious heat illness, including a body temperature of 103 degrees or higher, confusion, fainting, a fast and strong pulse, headache, dizziness, nausea, or hot, red skin that may be dry or damp.

For residents without air conditioning, the department recommended cool showers or baths, using the stove and oven less, and spending time in air-conditioned spaces such as libraries, cooling centers or shopping malls. Free cooling centers, splash pads and community pools are available across the county; locations can be found at ready.lacounty.gov/heat or by calling 211, a toll-free line available around the clock.