This fire season, California’s largest power companies may shut off at-risk power lines to prevent sparking wildfires.

That could mean no power for long periods, from mountainous regions to cities like San Francisco.

When the power goes out, traffic signals will start flashing and may even go dark if the power shut off lasts for days.

Caltrans operates nearly 5,000 traffic signals statewide, and the department wants to make sure you are ready when the lights go out.

In this News Flash, they will show you the safest way to navigate an intersection during times with no power.