Locations impacted by the warning include Mount Wilson, Pasadena, Altadena, Sierra Madre, Arcadia and Monrovia ... How to sign up for alerts in your area: LA County Orange County Riverside County San ...

Los Angeles County is included in an updated flash flood warning issued by the National Weather Service on Thursday at 5:15 p.m. The warning is in effect until 9 p.m. “At 5:15 p.m., Doppler radar and ...