Rain was falling across Southern California on Sunday, bringing some relief to thousands of firefighters battling multiple major blazes for nearly a month in the Los Angeles area, but also prompting new threats of floods and mudslides across burn-scarred lands.

Rain on the way to parched Southern California on Saturday will aid firefighters mopping up multiple wildfires. But heavy downpours on charred hillsides could bring the threat of new troubles like toxic ash runoff.

President Trump landed in Los Angeles Friday afternoon to tour damage from the devastating Palisades Fire, one of two deadly wildfires fires this month, greeting Gov. Gavin Newsom who was waiting at the bottom of the steps to Air Force One.

The president has had harsh words for state and local leaders in California amid the deadly blazes. He recently suggested that federal aid could come with strings.

Prior to arriving in California Friday, Trump told reporters in North Carolina that the Federal Government would not provide aid to Los Angeles recovery efforts unless new voter ID laws were passed and changes were made to the state's water management system.