You can usually hear police and fire engines coming to any fire almost immediately. However, if you are downslope from a burn area and it starts raining hard often you need to be going someplace else in your car or truck then. However, if this happens while you are asleep somewhere downslope of a burn area then often you might be dead. This happened in Montecito, a very wealthy area near Santa Barbara on January 2nd 2018. Around 25 people died because they had no warning when rocks and big boulders went through their homes (some the size of a house from the hills there. So, when it cloudburst on hillsides with no vegetation when it was all burned off (like the Palisades fire and the Eaton Fire for example) that cloudburst killed eventually 25 people shut down all main roads in Montecito.
In fact, Oprah's house didn't get destroyed or washed away but she watched her neighbor's house go by in the mudslides next to her house and land. Jeff Bridges the Actor and his wife had to be rescued by helicopter because all the roads were covered with mud and rocks and houses and debris then.
So, if a cloudburst happens near the Eaton or Palisades fire and you are downslope I would get out of their quickly so you don't die in a mudslide. The problem is the cloudburst can happen upslope and you wouldn't feel it until the mud and rocks and debris hit your house. But, then it would be too late.
So, basically if you hear of a large rainstorm coming to you upslope and you are in a burn area or next to one I would advise staying with relatives or friends nearby or getting a hotel room upslope of any burn areas or far away from there so you don't become one of the death statistics. Because fires this time of year often cause things like the Montecito Mudslides that happened in January of 2018 when ever it rains after the fire.