A heatwave that started after Labor Day in the western United States is set to continue bringing dangerously high temperatures to millions this weekend, particularly affecting Southern California.

On Friday, Downtown Los Angeles saw a heat index soaring to 112 degrees, marking the third time this level has been recorded since 1877, according to the local NWS office on social media. An excessive heat warning remains in effect for Los Angeles County.

In San Diego and Orange counties, coastal areas are expected to reach around 90 degrees, while some inland regions may approach 110 degrees. Palm Springs is predicted to swelter at 112 degrees on Saturday.

Additionally, in Oregon and Washington, high temperatures have led to red flag warnings due to wildfire risks in the Cascade Mountains, as reported by the NWS Portland office.

The Centers for Disease Control and Prevention warns that excessive heat can cause serious health problems or even death, particularly for the elderly, the very young, outdoor workers, individuals with certain health conditions, or those without air conditioning or who are homeless.

The Los Angeles City Fire Department advises residents to plan ahead and minimize outdoor activities during peak heat hours.

In a recent post on social media, Erik Scott, a spokesperson for the LAFD, emphasized the importance of staying hydrated even if you don’t feel thirsty; finding shade outdoors, and using air conditioning and fans indoors; taking cold showers or baths; and wearing lightweight cotton or linen clothes. Additionally, he urged checking on vulnerable individuals who may be more susceptible to heat-related illnesses. Importantly, Scott reminded everyone not to leave children or pets in parked cars, as temperatures can spike rapidly inside.

This summer has been recorded as the hottest on the planet, according to Copernicus, Europe’s climate service, with average summer temperatures in 2024 surpassing those of 2023, which was the hottest year prior.