As President Donald Trump prepares to tour wildfire damage in California, he’s zeroing in on one of his frequent targets for criticism: State water policy.

Trump pledged to provide federal disaster relief for people affected by the deadly wildfires ravaging southern California.

After weeks of windy and dry weather, rain has fallen in parched Southern California and is expected to aid firefighters who are mopping up multiple wildfires. But potentially heavy downpours on charred hillsides could bring new troubles such as toxic ash runoff.

Beneficial rain moved into Southern California over the weekend for wildfire areas, however, the rain brought a new threat of flash flooding. Flood alerts are in place through Monday and more rain is on the way through Tuesday.