Excessive Heat Watch issued August 25 at 4:04AM PDT until August 29 at 10:00PM PDT by NWS

...Excessive Heat Watch in effect for Inland areas of Southwest California as well as the Los Angeles Basin beginning Sunday morning through Tuesday evening... ...Excessive Heat Watch in effect for the Coastal Areas from San Luis Obispo to Ventura Counties Monday morning through Tuesday evening...

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/2wtPzNs