Heat Advisory for Parts of Idaho Extended Through Night of August 21
A heat advisory covering ten regions in Idaho now runs longer than first issued, remaining in effect through 10:00 p.m. MDT on August 21, 2026.
4 reports on this incident · first at Aug 19, 2026, 8:17 a.m. ET
Earlier reports
Aug 19, 2026, 8:54 a.m. ET
Heat Advisory for Arco/Mud Lake Desert, Snake River Plain and Marsh and Albion Highlands as Highs Near 100
A Heat Advisory has been issued for ten Idaho areas: the Arco/Mud Lake Desert, Upper Snake River Plain, Lower Snake River Plain, Marsh and Albion Highlands, Franklin/Eastern Oneida Region, Eastern Magic Valley, Shoshone/Lava Beds, Wood River Foothills, Southern Hills/Albion Mountains and Raft River Region, according to localnews8.com.
Reports from localnews8.com conflict on when the advisory begins, placing the start at either 12:00 PM on August 20, 2026, or 12:00 PM on August 21, 2026. The advisory is scheduled to expire at 10:00 PM on August 21, 2026.
Widespread temperatures ranging from 94 to 100 degrees are expected across the advised areas, localnews8.com reported. Hot temperatures may cause heat illnesses.
Reported precautions advise residents to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Residents are also advised to monitor the latest forecasts and warnings for updates.
Aug 19, 2026, 8:24 a.m. ET
Heat Advisory Covers Upper Snake River Plain, Arco/Mud Lake Desert and Eight More Idaho Areas
Hot temperatures may cause heat illnesses, according to reports from localnews8.com. Widespread temperatures are expected to range from 94 to 100 degrees across the advised areas.
The Heat Advisory covers the Arco/Mud Lake Desert, Upper Snake River Plain, Marsh and Albion Highlands, Franklin/Eastern Oneida Region, Eastern Magic Valley, Shoshone/Lava Beds, Wood River Foothills, Southern Hills/Albion Mountains, Raft River Region, and Lower Snake River Plain.
Conflicting reports from localnews8.com list the advisory start time as either 12:00 PM on August 20, 2026, or 12:00 PM on August 21, 2026. The advisory is scheduled to end at 10:00 PM on August 21, 2026.
Precautions reported by localnews8.com include drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. Residents are also advised to monitor the latest forecasts and warnings for updates.
Aug 19, 2026, 8:17 a.m. ETFirst report
Heat Advisory Scheduled for Parts of Idaho on August 21
A heat advisory has been scheduled for August 21, 2026, with widespread temperatures ranging from 94 to 100 degrees expected across several regions, localnews8.com reported. The situation remains developing.
According to localnews8.com, the advisory period starts at 12:00 PM on August 21, 2026, and expires at 10:00 PM on August 21, 2026. The advised areas include the Arco/Mud Lake Desert, Upper Snake River Plain, Marsh and Albion Highlands, and Franklin/Eastern Oneida Region.
Localnews8.com reported that hot temperatures may cause heat illnesses. Recommended precautions include drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking up on relatives and neighbors. Residents are also advised to monitor the latest forecasts and warnings for updates.
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Sources
- Heat Advisory issued August 19 at 2:44AM MDT until August 20 at 10:00PM MDT by NWS Pocatello ID - Local News 8localnews8.com
- Heat Advisory issued August 19 at 2:44AM MDT until August 21 at 10:00PM MDT by NWS Pocatello ID - Local News 8localnews8.com
- Heat Advisory issued August 19 at 2:44AM MDT until August 21 at 10:00PM MDT by NWS Pocatello ID - Local News 8localnews8.com
Revision history
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