RESEDA ( — Health officials issued a heat alert on Thursday for residents as scorching temperatures grips Southern California.

The alert has been issued for Los Angeles and Riverside counties. It will extend through Sunday evening.

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Temperatures are expected to climb above normal to the triple-digits, ranging from 105 to 110 degrees Fahrenheit are expected for the inland valleys, mountains and desert regions, the National Weather Service reported.

The Riverside County Department of Public Health urged residents to take precaution during extreme heat conditions against heat-related injuries such as heat stroke, dehydration and other illnesses.

“Take this heat seriously, even if you’re healthy,” said Dr. Cameron Kaiser, the county public health officer. “Just a few precautions can help you stay safe.”

Officials added that high temperatures can be hazardous for many, especially the elderly, children and those with medical conditions.

Kaiser reminded the public to limit outdoor activity, wear loose and light-colored clothing, to drink lots of water, remain indoors in air-conditioned buildings and to take cool showers or baths.

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The NWS recommended residents to stay out of the midday sun, to provide shade and water for livestock and pets and to check on neighbors.

During a heat wave, alcohol and liquids containing high amounts of sugar should be avoided.

Health officials advised those who work in hot zones to reschedule strenuous activities through this weekend.

The Los Angeles Department of Water and Power also urged residents to conserve energy within their homes between the hours of 11 a.m. and 6 p.m. during extreme heat conditions.

Meanwhile, firefighters will remain on high alert through the weekend as the scorching temperatures heightens the chance for fire danger.

Residents without air conditioning have been urged to visit local cooling centers, which are located in local libraries, senior and community centers.

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For a list of cooling center locations, click here.