The National Weather Service in Pocatello issued a heat advisory Thursday morning affecting Southeast Idaho communities as temperatures are expected to reach dangerously high levels throughout the day.
The advisory took effect at 1 p.m. Thursday and remains in place until 9 p.m. MDT, covering a broad swath of the region including the Eastern Magic Valley, Shoshone and Lava Beds areas, Arco and Mud Lake Desert, the Lower Snake River Plain, Raft River Region, Southern Hills and Albion Mountains, and the Upper Snake River Plain.
Dangerous Heat Expected
Forecasters predict valley temperatures will climb to between 95 and 100 degrees during the afternoon and early evening hours. Such sustained heat poses a genuine health risk, particularly for vulnerable populations including the elderly, young children, and those with existing medical conditions.
Heat-related illnesses can develop rapidly when the body cannot cool itself adequately. Symptoms range from heat exhaustion—characterized by heavy sweating, weakness, and dizziness—to heat stroke, which is a medical emergency requiring immediate professional care.
Protective Measures Recommended
Health officials and the weather service recommend residents take several precautions to stay safe during the advisory period. Staying hydrated by drinking fluids throughout the day is essential, even if you do not feel thirsty. Remaining indoors in air-conditioned spaces, particularly during peak afternoon hours when temperatures peak, significantly reduces heat exposure.
Residents should limit time spent outdoors and avoid strenuous activity during the hottest part of the day. Those who must go outside should wear light-colored, loose-fitting clothing and apply sunscreen to exposed skin.
The advisory also emphasizes the importance of checking on friends, family members, and neighbors—especially those living alone or without reliable air conditioning. Older adults and those taking certain medications may be at elevated risk and deserve particular attention.
Looking Ahead
While this Thursday’s heat advisory is isolated to the evening hours, residents should monitor forecasts for potential additional heat waves in the coming days. Southeast Idaho is also bracing for scattered storms Tuesday before heavier weather expected Wednesday, which may bring temporary relief from the heat but could create other hazards.
In the meantime, keep pets indoors or provide adequate shade and fresh water if they are outside. Never leave children or pets in parked vehicles, as interior temperatures can become lethal within minutes during hot weather.