LOS ANGELES — Winds began gaining strength across Southern California on Tuesday, as forecasters warned of “life-threatening, destructive” gusts that could last for days while toppling trees, creating dangerous surf and bringing extreme fire risk to areas that haven’t seen substantial rain in months.

The National Weather Service said what could be the strongest Santa Anawindstorm in more than a decade would begin in the afternoon across Los Angeles and Ventura counties and peak in the early hours of Wednesday, when gusts could reach 80 mph (129 kph). Isolated gusts could top 100 mph (160 kph) in mountains and foothills.

The weather service warned of possible downed power lines and knocked-over big rigs, trailers, and motorhomes. Strong offshore gusts will also bring dangerous conditions off the coasts of Orange and Los Angeles counties, including Catalina Island, and potential delays and turbulence could arise at local airports.

Firefighters responded Tuesday morning to a handful of small blazes burning near homes in LA County, scrambling to stop the flames before they get carried away by increasing winds.

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Southern California Edison said it was considering preemptively cutting power starting Tuesday to more than 415,000 utility customers across seven counties. San Diego Gas & Electric said it could shut service to more than 64,000 customers. In recent years, California utilities have routinely de-energized electrical lines as a precaution against weather conditions that might damage equipment and spark a fire.

Winds Will Act as an ‘Atmospheric Blow-Dryer’

The upcoming winds will act as an “atmospheric blow-dryer” for vegetation, bringing a long period of fire risk that could extend into the more populated lower hills and valleys, according to Daniel Swain, a climate scientist with the University of California, Los Angeles and the National Center for Atmospheric Research.

“We really haven’t seen a season as dry as this one follow a season as wet as the previous one,” Swain said during a Monday livestream. “All of that extra abundant growth of grass and vegetation followed immediately by a wind event of this magnitude while it’s still so incredibly dry,” elevates the risk.

Recent dry winds, including the notorious Santa Anas, have contributed to warmer-than-average temperatures in Southern California, where there’s been very little rain so far this season.

Southern California hasn’t seen more than 0.1 inches (0.25 centimeters) of rain since early May. Much of the region has fallen into moderate drought conditions, according to the U.S. Drought Monitor. Meanwhile, up north, there have been multiple drenching storms.

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Areas where gusts could create extreme fire conditions include the charred footprint of last month’s wind-driven Franklin Fire, which damaged or destroyed 48 structures, mostly homes, in and around Malibu.

The blaze was one of nearly 8,000 wildfires that added up to scorch more than 1,560 square miles (more than 4,040 square kilometers) in the Golden State last year.

The last wind event of this magnitude occurred in November 2011, during which more than 400,000 customers lost power across LA County, the Los Angeles Times reported.

“The grid is built to withstand strong winds,” said Jeff Monford, a spokesperson for the utility. “The issue here is the possibility of debris becoming airborne and hitting wires … or a tree coming down.”