The National Weather Service has extended a Heat Advisory for all San Diego coast and valley areas from 11:00 AM Wednesday until 8:00 PM PDT Thursday. The County operates a Cool Zones program and has designated more than 126 air-conditioned buildings as cooling centers. For a listing of Cool Zone locations, hours of operation, and tips to beat the heat, visit: https://www.sandiegocounty.gov/content/sdc/hhsa/programs/ais/cool_zones.html. More forecast information and updates are available from the National Weather Service.