More than an inch of rain fell in parts of Los Angeles Monday afternoon, triggering flash flood watches and warnings in areas scorched by this month's wildfires.

Fanned by strong winds, the wildfires have killed at least 24 people and swept through 40,000 acres in the Greater Los Angeles area.

As Los Angeles recovers from its devastating wildfires, environmental engineers, urban planners and natural disaster experts are casting forward with visions of what could come next for neighborhoods that have been reduced to ash and rubble.

The FireAid benefit concerts will offer aid to LA after wildfires devastated the city. The lineup includes stars like Billie Eilish and Lady Gaga.