FireAid was a marathon, landmark event, with at least 39 artists performing 68 songs over six hours, weaving together a sonic tapestry of past and present, heartbreak and hope for Los Angeles.

Billie Eilish guested with Green Day. Joni Mitchell, Graham Nash and Stephen Stills conjured a Laurel Canyon vibe. Jelly Roll sang a Bob Seger song with Blink-182’s Travis Barker pounding away on ...