California residents were urged to prepare for possible heat-related outages as summer temperatures rise and heavier electricity use puts added stress on the grid.
Emergency guidance centers on outage alerts, emergency kits with water, food, medications and flashlights, and locating cooling centers before power fails.
Health and home steps include drinking plenty of water, keeping refrigerators and freezers closed, blocking sunlight with blinds and drapes, and avoiding candles in outages.
The advisory also highlights backup power for medical equipment through the Critical Care Backup Battery program and asks residents to unplug electronics, leave one light on, and check in with family, friends and neighbors.