A weather event called the diablo wind is expected to whip up across Northern California and cause humidity levels to drop and raise the risk of wildfires.

Southern California Edison announced it may shut off power as early as Friday morning in case of hazardous conditions.

Red flag fire warnings have been raised and utilities have said they could need to cut power supplies. California wildfire risks are rising as the state’s annual wind season gets underway with gusts rolling out of the north that can fan any flame into an out-of-control blaze,

A so-called “inside slider” is forecast to bring breezy weather to a large portion of California later this week, heightening wildfire risk at a time of year when vegetation is parched and flammable.