Southern California under extreme heat warning, increased fire risk

The heatwave is expected to last for nearly a week.

A dangerous, long-duration heatwave is sweeping through much of Southern California beginning Friday, creating increased fire risk in the region.

Extreme to moderate heat warnings are in place for more than 34 million Californians, with temperatures forecast to reach between 92 and over 105 degrees, including along the coastal plains.

The National Weather Service in Los Angeles warned the conditions have created a high risk of "large and fast-moving fires" in the region's valleys and mountains.

The heatwave is expected to begin on Friday and last through at least Oct. 8.

Temperatures are expected to rise to around 15 degrees above average, creating potentially life-threatening conditions for those without access to air conditioning.

Little relief from the heat is forecasted in the overnight hours, though lower humidity is expected.

Windy conditions expected over the weekend will contribute to the fire risk. A wind advisory is in place, with gusts of up to 50 miles per hour forecasted.

Those under heat warnings are advised to watch out for heat-related illnesses, including heat exhaustion and heat stroke.

Anyone experiencing symptoms of heat-related illnesses is encouraged to move to a cooler area, wear loose clothing, sip cool water and apply ice. Those with heat stroke symptoms, including dizziness, confusion or becoming unconscious, are advised to call 911.