Heat Advisory issued September 7 at 10:57AM PDT until September 10 at 10:00PM PDT by NWS Hanford CA

West Side Mountains north of 198; Los Banos - Dos Palos; Merced - Madera - Mendota; Planada - Le Grand - Snelling; Coalinga - Avenal; West Side of Fresno and Kings Counties; Caruthers - San Joaquin - Selma; Fresno-Clovis; West Side Mountains South of 198; Buttonwillow - Lost Hills - I5; Delano-Wasco-Shafter; Hanford - Corcoran - Lemoore; Visalia - Porterville - Reedley; Buena Vista; Bakersfield; Southeast San Joaquin Valley; South End San Joaquin Valley; Mariposa Madera Foothills; Fresno-Tulare Foothills; South End Sierra Foothills

Urgency: Expected

Certainty: Likely

Onset: 9/9/2026, 5:00:00 PM

Expires: 9/8/2026, 2:00:00 AM

Details

* WHAT...High temperatures up to 102 and morning lows up to 75 expected. Widespread Moderate HeatRisk will be present with areas of Major HeatRisk in the foothills where the thermal belt is strongest and in urban areas. * WHERE...The San Joaquin Valley, Sierra Nevada Foothills, and West Side Hills along the Coastal Range. * WHEN...From 10 AM Wednesday to 10 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses, especially those without effective cooling and/or adequate hydration. * ADDITIONAL DETAILS...Little to no relief at night in areas of Major HeatRisk. Air conditioning is necessary; fans and open windows at night will not be enough.

What To Do

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Other Active Heat Advisory Alerts

Heat Advisory issued September 7 at 1:16PM CDT until September 8 at 8:00PM CDT by NWS Fort Worth TX

Montague; Cooke; Grayson; Wise; Denton; Collin; Hunt; Delta; Hopkins; Tarrant; Dallas; Rockwall; Kaufman; Van Zandt; Rains; Johnson; Ellis; Henderson; Navarro

Heat Advisory issued September 7 at 1:16PM CDT until September 8 at 8:00PM CDT by NWS Fort Worth TX

Fannin; Lamar

Heat Advisory issued September 7 at 1:16PM CDT until September 8 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO

Doniphan; Atchison; Nodaway; Worth; Gentry; Harrison; Holt; Andrew; De Kalb; Daviess; Grundy; Buchanan; Clinton; Caldwell; Livingston; Ray; Carroll; Chariton; Lafayette; Saline; Howard; Johnson; Pettis; Cooper; Henry

Heat Advisory issued September 7 at 11:09AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA

Riverside County Mountains; San Diego County Mountains

Heat Advisory issued September 7 at 11:09AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA

San Diego County Coastal Areas; Orange County Coastal

Source: National Weather Service.