The National Weather Service office in Pocatello issued a Heat Advisory early Friday morning covering a broad swath of southeast and south-central Idaho, warning residents that dangerous heat could lead to serious health emergencies through midnight Saturday.
The advisory, issued at 12:41 a.m. MDT on August 1, covers more than a dozen zones across the region, including the Lower Snake River Plain, Upper Snake River Plain, Raft River Region, Eastern Magic Valley, Bear Lake Valley, Arco/Mud Lake Desert, Teton Valley, Lost River Valley, Challis and Pahsimeroi Valleys, Wood River Foothills, Shoshone/Lava Beds, and the Beaverhead-Lemhi Highlands.
What to Expect
Temperatures across the affected areas are forecast to climb into the mid-90s to around 100 degrees on Saturday. Health officials stress that those kinds of sustained temperatures can trigger heat-related illness rapidly, especially for the elderly, young children, outdoor workers, and anyone without access to air conditioning.
Residents should be aware of the difference between heat exhaustion — which can often be treated with rest, fluids, and cooling — and heat stroke, which is a life-threatening emergency. Symptoms of heat stroke include a high body temperature, confusion, and loss of consciousness. Anyone who witnesses these symptoms should call 911 immediately.
Safety Steps for Outdoor Workers and the Public
The Occupational Safety and Health Administration recommends that employers and workers performing outdoor labor take frequent rest breaks in shaded or air-conditioned environments throughout the day rather than pushing through continuous exertion in peak heat. Workers in agriculture, construction, and other outdoor industries are among the most vulnerable during extended heat events.
For the general public, the most effective protective measures include staying indoors during the hottest hours of the day, drinking water consistently rather than waiting until thirst sets in, and checking on neighbors or relatives who may be isolated and without adequate cooling.
Those who need help finding shelter or cooling resources can call 211 or visit 211-idaho.communityos.org to locate nearby assistance. The 211 line connects callers with local social services, including cooling centers that may be available in communities across the advisory area.
Wildfire risk also escalates during heat events like this one. With dry conditions already driving fire activity across the region — including a recent wildfire near Ammon that scorched more than 100 acres — residents should avoid activities that could ignite dry grasses or brush during the advisory period.
What Comes Next
The Heat Advisory remains in effect until midnight Saturday, August 2. Residents should monitor updated forecasts from the National Weather Service Pocatello office as conditions evolve. If temperatures moderate or the threat increases, NWS may update, extend, or upgrade the advisory. Bannock County residents in the Pocatello and Chubbuck area are within the Lower Snake River Plain advisory zone and should plan accordingly for Saturday’s heat. Check back with Bannock County News and Idaho News for any updates to this developing weather situation.