Evacuations ordered as relentless rain slams California

The rain is triggering flash floods and powerful mudslides in parts of California already devastated by wildfires.
1:44 | 11/30/18

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Transcript for Evacuations ordered as relentless rain slams California
storms out west. Relentless rain forcing mandatory evacuations and triggering powerful mudslides and it's happening in areas already affected and devastated by wildfires. ABC's will Carr is in agoura hill, California, with the very latest. Good morning, will. Reporter: Michael, the sandbags are out because this is really a double-edged sword. You had those wildfires, which burned the trees that normally stop all that rock and mud from flowing down into communities like in that have been devastated and now that we're getting that much-needed rain we're also getting dangerous mudslides. They're sweeping across parts of California scorched by wildfires trapping cars and forcing evacuations. There's a lot of mud coming down at a very rapid rate of speed in rice canyon. Reporter: The fragile fire-scarred hillsides crumbling of a nonstop deluge. Bone dry and thirsty for rain getting so much precipitation so quickly -- It was bad. We almost lost our whole driveway. Reporter: Roads inundated seeing crash after crash. Some areas getting enough to bury highway signs. This big rig left dangling off the side of a highway, cars flipped over and flattened. Four firefighters injured when a car spun out and crashed into their truck. This man overwhelmed by the raging waters of the L.A. River airlifted to safety and emergency services telling residents to evacuate but as the threat continues to grow, some residents choosing to stay. If we do, we're going to lose it. If we don't, we can fight it. Which is what we've been doing. Reporter: While the rain has let up we're expecting more in the region this weekend and into next week.

This transcript has been automatically generated and may not be 100% accurate.

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