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.

Green Day and Billie Eilish performed together, Billy Crystal spoke of the pain of losing his home in the fires, and Joni Mitchell gave a rare performance.

Some of the biggest names in music will come together on Thursday to raise money for Los Angeles-area wildfire relief efforts

The first of two concerts collectively being referred to as FireAid kicked off at the Kia Forum in the Los Angeles city of Inglewood, to support relief efforts in the wake of the deadly wildfires that ignited earlier this month in the LA area,