Southern California Edison, one of the major electricity providers, could shut off power to more than 409,000 residents amid a major Santa Ana windstorm this week.

Gusty, dry winds — some that could reach up to 100 mph — are forecast across much of Los Angeles beginning Tuesday, and are expected to elevate the threat for fast-moving wildfires.

The strongest winds in more than a decade could hit Southern California, potentially causing structural damage and bringing extreme fire risk to areas that haven’t seen substantial rain in months.