Areas charred by last month's wildfires in Southern California now face a new threat from a powerful, but fast-moving Pacific storm. Here's what you need to know about this threat.

As Los Angeles braces for its most powerful storm of the season, concerns of mudslides and debris flows in recently fire-hit areas have prompted evacuation warnings.

National Weather Service forecasters today warned of a strong storm system is making its way toward Los Angeles, saying that the storm could trigger flooding and debris flows, particularly in recent burn areas.