A powerful storm system bearing down on the San Gabriel Valley prompted the National Weather Service to issue a flood watch for Pasadena, Altadena and much of Los Angeles County on Monday, while county officials activated evacuation warnings for properties near the Eaton Fire burn scar beginning Sunday night at 9 p.m.
The storm, which the NWS described as “very significant and dangerous,” is forecast to deliver one to three inches of rain across the Los Angeles Basin and two to five inches in the foothills and mountains by late Monday — with the most intense rainfall expected between 6 a.m. and 6 p.m., according to the NWS.
For Pasadena and Altadena residents still recovering from the Eaton Fire, the primary danger is the threat of mud and debris flows on the unstable burn scar terrain…