Areas scarred by the Eaton Fire are at “high to very high risk” of debris flows this week. How do they happen? What is being done to prepare for storms?

By Matt Stiles, Sean O'Key, Byron Manley, Lou Robinson, Curt Merrill, Annette Choi, Rachel Wilson, Henrik Pettersson, Amy ...

In some areas, hazards have surged. Buildings in the highest severity zones will be subject to the strictest fire-resiliency rules.

Cal Fire will begin rolling out new fire-hazard severity maps, which are expected to more than double the land in ...