(CNN)Last week rivers of mud and boulders flooded the streets and homes in Montecito, California. At least 20 people were killed.
How to help the victims of the California mudslides
For ways to make a difference supporting organizations responding to the disaster, click the "take action" button below.
The mudslides destroyed an estimated 65 homes and damaged more than 450 in an area that had already endured the massive Thomas Fire.
If you live near the areas affected by the mudslides -- or are worried about someone who does -- you can visit the American Red Cross Safe and Well website. This reunification tool lets people search for loved ones or indicate that they are safe.
The Red Cross is urgently appealing for blood and platelet donors in Southern California. You can find a nearby blood drive location here.