Now, dry and burned soil stripped of its native chaparral and grasses forms a glasslike layer, allowing rainwater that would normally be absorbed to cascade downhill.“We don’t need the storm necessarily to produce a high total amount of rainfall,

According to the National Weather Service, periods of moderate to heavy rain are expected through Monday afternoon and could trigger flash flooding and mudslides in fire zones.

The weather provided relief for crews working to contain wildfires, though rain over a burn area ups the chances of flooding and mudslides

Clean-up crews rush to protect burn areas as storms bring risk of debris flows, forcing road and school closures

The National Weather Service says the "threat is high enough to prepare for the worst-case scenario."