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Continental Signals
Severe weather · NA
Severe weather · Heat

Heat is the quiet killer.

More people die from heat each year in the US and Canada than from any other weather hazard. Warnings arrive quietly — a bulletin, not a siren — and the danger builds across days, not hours.

United States · NWS

Advisory · Warning · HeatRisk.

The NWS issues Heat Advisories, Excessive Heat Watches, and Excessive Heat Warnings based on heat index and duration. The newer HeatRisk index (green→magenta) accounts for local acclimatization and vulnerable populations.

Canada · ECCC

Heat warnings and Humidex.

ECCC issues heat warnings on province-specific thresholds combining temperature and humidity (often via Humidex). Some provinces run tiered systems — 'heat warning' and 'extended heat warning' — and municipal health units activate cooling centres independently.

Live · Heat

Active alerts right now.

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Alerts near you

Point-based lookup covers US zones only. Canadian users: browse alerts by hazard below.

Last updated · Thu, 23 Jul 2026 06:49:49 GMT · cached 60s
United States · 54
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:41AM MDT until July 23 at 8:00PM MDT by NWS Albuquerque NM
    Quay County
    Until 7/23/2026, 6:00:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 1:26AM CDT until July 23 at 8:00PM CDT by NWS Norman OK
    Harper; Ellis; Woodward; Roger Mills; Dewey; Custer; Wichita; Archer
    Until 7/23/2026, 8:30:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 1:26AM CDT until July 23 at 8:00PM CDT by NWS Norman OK
    Beckham; Washita; Harmon; Greer; Kiowa; Jackson; Tillman; Hardeman; Foard; Wilbarger; Knox; Baylor
    Until 7/23/2026, 8:30:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 22 at 11:17PM PDT until July 23 at 9:00PM PDT by NWS Pendleton OR
    Eastern Columbia River Gorge of Oregon; Lower Columbia Basin of Oregon; Foothills of the Northern Blue Mountains of Oregon; Eastern Columbia River Gorge of Washington; Yakima Valley; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington
    Until 7/23/2026, 11:30:00 PM
  • Extreme Heat Watch · Severe
    Extreme Heat Watch issued July 22 at 11:53PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT
    Western and Central Chouteau County; Cascade County below 5000ft; Judith Basin County and Judith Gap
    Until 7/23/2026, 11:00:00 PM
  • Extreme Heat Watch · Severe
    Extreme Heat Watch issued July 22 at 11:53PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT
    Hill County; Northern Blaine County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft
    Until 7/23/2026, 11:00:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 22 at 10:48PM PDT until July 23 at 9:00PM PDT by NWS Spokane WA
    Northern Panhandle; Coeur d'Alene Area; Lewiston Area; Lewis and Southern Nez Perce Counties; Northeast Blue Mountains; Lower Garfield and Asotin Counties; Washington Palouse; Moses Lake Area; Upper Columbia Basin; Spokane Area; Northeast Mountains; Okanogan Highlands; Wenatchee Area; Okanogan Valley; Waterville Plateau; Central Chelan County; Western Chelan County; Western Okanogan County
    Until 7/23/2026, 7:00:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:10AM CDT until July 23 at 7:00PM CDT by NWS Houston/Galveston TX
    Houston; Trinity; Madison; Walker; Burleson; Brazos; Washington; Grimes; Montgomery; Colorado; Austin; Waller; Wharton; Inland Jackson; Coastal Jackson
    Until 7/24/2026, 12:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:08AM CDT until July 23 at 8:00PM CDT by NWS Shreveport LA
    Wood; Upshur; Smith; Gregg; Harrison; Cherokee; Rusk; Panola; Nacogdoches; Shelby; Angelina; San Augustine; Sabine
    Until 7/24/2026, 1:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:02AM CDT until July 23 at 8:00PM CDT by NWS San Angelo TX
    Fisher; Nolan; Coke; Runnels; Tom Green; Concho; Haskell; Throckmorton; Jones; Shackelford; Taylor; Callahan; Coleman; Brown; McCulloch; San Saba; Menard; Kimble; Mason
    Until 7/24/2026, 1:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:02AM CDT until July 23 at 8:00PM CDT by NWS San Angelo TX
    Sterling; Irion; Crockett; Schleicher; Sutton
    Until 7/24/2026, 1:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:02AM CDT until July 23 at 8:00PM CDT by NWS Austin/San Antonio TX
    Real
    Until 7/24/2026, 1:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:02AM CDT until July 23 at 8:00PM CDT by NWS Austin/San Antonio TX
    Williamson; Travis; Bastrop; Lee; Fayette; Lavaca
    Until 7/24/2026, 1:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:02AM CDT until July 23 at 8:00PM CDT by NWS Austin/San Antonio TX
    Llano; Burnet; Val Verde; Edwards; Kerr; Bandera; Gillespie; Kendall; Blanco; Hays; Kinney; Uvalde; Medina; Bexar; Comal; Guadalupe; Caldwell; Maverick; Zavala; Frio; Atascosa; Wilson; Karnes; Gonzales; De Witt; Dimmit
    Until 7/24/2026, 1:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:00AM CDT until July 23 at 8:00PM CDT by NWS Fort Worth TX
    Young; Jack; Wise; Stephens; Palo Pinto; Parker; Erath; Hood; Somervell; Johnson; Ellis; Henderson; Hamilton; Bosque; Hill; Navarro; Freestone; Anderson; Coryell; Bell; McLennan; Falls; Limestone; Leon; Milam; Robertson
    Until 7/23/2026, 7:00:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:00AM CDT until July 23 at 8:00PM CDT by NWS Fort Worth TX
    Denton; Collin; Hunt; Tarrant; Dallas; Rockwall; Kaufman; Van Zandt; Rains; Eastland; Comanche; Mills; Lampasas
    Until 7/23/2026, 7:00:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 23 at 12:00AM CDT until July 23 at 8:00PM CDT by NWS Fort Worth TX
    Delta; Hopkins
    Until 7/23/2026, 7:00:00 PM
  • Extreme Heat Watch · Severe
    Extreme Heat Watch issued July 22 at 10:51PM MDT until July 26 at 9:00PM MDT by NWS Billings MT
    Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Beartooth Foothills; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Sheridan Foothills
    Until 7/24/2026, 5:00:00 AM
  • Heat Advisory · Moderate
    Heat Advisory issued July 22 at 11:08PM CDT until July 23 at 7:00PM CDT by NWS Corpus Christi TX
    La Salle; McMullen; Live Oak; Bee; Goliad; Victoria; Webb; Inland San Patricio; Coastal Aransas; Inland Refugio; Inland Calhoun; Coastal San Patricio; Coastal Refugio; Coastal Calhoun
    Until 7/23/2026, 9:15:00 PM
  • Heat Advisory · Moderate
    Heat Advisory issued July 22 at 11:07PM CDT until July 23 at 8:00PM CDT by NWS Dodge City KS
    Meade; Clark
    Until 7/24/2026, 1:00:00 AM
Canada · 0
  • No active alerts.
Safety

If an alert covers you.

  • →Drink water before you feel thirsty. By thirst you're already behind.
  • →Never leave children or pets in a parked car — interior temperatures can rise 20°F/11°C in 10 minutes.
  • →Check on elderly neighbours, people living alone, and anyone without AC at least twice a day.
  • →Move to a cooling centre, library, or mall if your home stays above 26°C/80°F overnight.
  • →Watch for heat stroke: hot dry skin, confusion, no sweating. This is a medical emergency — call 911.
Sources