At least two of the people killed in the Southern California wildfires tried to protect the homes where they raised families and lived for decades, while another stayed behind with his son who had cerebral palsy and could not evacuate.

Nonprofit groups are working to distribute essential supplies to those impacted by the fires across the Los Angeles area.

Investigators are considering an array of possible ignition sources for the fires that have killed at least 10 people and destroyed thousands of structures in California.

Two of the fires — the Palisades and Eaton fires — were listed among the five most destructive fires in the state’s history.