Montecito debris flows (2018)
Heavy rain fell on the burn scar left by the massive Thomas Fire above Montecito, California. Within hours, mud and boulders tore through the town, killing 23 people and destroying over 100 homes.
The disaster showed how quickly a fire-scarred hillside can fail in the first wet season.
It pushed California to invest heavily in post-fire hazard assessment, debris-flow warnings, and slope stabilization.
The Salt Lake foothills above Red Butte Garden face the same risk: rain on bare, charred slopes can move fast and reach populated areas.
