https://www.mercurynews.com/2022/01/25/colorado-fire-containment-reaches-45-percent-parts-of-highway-1-remain-closed-hundreds-still-evacuated/

Hot embers from a pile burning operation sparked the Colorado Fire along the Big Sur coast, according to an investigation by the California Department of Forestry and Fire Protection.

“High winds blew the embers onto nearby vegetation, which ignited the fire,” Cal Fire said in a news release.