Here's how wildfire burn scars could intensify flooding as Tropical Storm Hilary hits California

Portions of the southwestern U.S. already dealing with the aftermath of wildfires could soon face life-threatening flooding from Tropical Storm Hilary. 

The storm made landfall Sunday in the northern part of Mexico's Baja California and is expected to move north toward the southwestern U.S. 

A tropical storm warning has been issued for southern California. Orange County sent an alert for anyone living in a wildfire burn scar in the Silverado and Williams canyons. Here's what to know about the dangers posed by burn scars during heavy rainfall.