Warning in Effect Now
An Extreme Heat Warning is currently in effect for nine Iowa counties: Harrison, Monona, Sioux, Lyon, Butler, Emmet, Buchanan, Mitchell, and Howard. The warning was issued on July 25, 2026, at 4:54 PM CDT and remains in effect through July 26, 2026, at 9:00 PM CDT. Residents in these areas should treat this alert as active regardless of when they are reading this, conditions are expected to remain dangerous throughout the warning window.
The warning has been issued collectively by multiple National Weather Service offices with jurisdiction across the region, including NWS Omaha/Valley NE, NWS Sioux Falls SD, NWS Des Moines IA, NWS Quad Cities IA IL, and NWS La Crosse WI. The lead headline was issued by NWS Omaha/Valley NE. The involvement of five separate NWS offices underscores the geographic breadth and seriousness of this heat event across Iowa.
What the National Weather Service Is Telling Residents to Do
The National Weather Service has issued direct, specific guidance for anyone living in or traveling through the affected counties. Officials are urging residents to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. That last point is particularly important, not everyone has easy access to cooling, and a personal check-in can make a life-saving difference for elderly neighbors, those with medical conditions, or anyone living alone.
The NWS is also issuing a firm warning about unattended vehicles: do not leave young children or pets in a vehicle that is not actively supervised. Car interiors can reach lethal temperatures within minutes, even with windows cracked. This is not a theoretical risk, it is a documented cause of death during heat events, and the National Weather Service is treating it as a primary danger during this warning period.
For those who must be outdoors, the NWS advises taking extra precautions. Wear lightweight and loose-fitting clothing to help the body regulate temperature. Try to limit strenuous physical activities to early morning or evening hours, when temperatures are lower. Residents and bystanders should also know the warning signs of heat exhaustion and heat stroke, and take immediate action if those symptoms appear in themselves or anyone around them. The NWS instruction is explicit: take action when you see symptoms, do not wait.
Putting This in Context for Preparedness
Extreme Heat Warnings represent the highest tier of heat-related alerts issued by the National Weather Service, reserved for conditions that pose a direct threat to life. For households and communities thinking about broader disaster preparedness, this event is a reminder that heat is one of the leading weather-related causes of death in the United States, and that the core protective actions are straightforward and accessible: a cool space, adequate hydration, and looking out for the people around you. At USRiskRadar, we track active NWS alerts across the country so that residents can stay informed and act quickly when conditions like these develop. If you are in one of the nine affected Iowa counties, follow the official NWS guidance now and continue monitoring updates through the National Weather Service at weather.gov.
For the fundamentals that apply beyond this specific alert, see our Power Outage Preparedness guide.
Source: National Weather Service (NWS Omaha/Valley NE, NWS Sioux Falls SD, NWS Des Moines IA, NWS Quad Cities IA IL, NWS La Crosse WI), active alert data retrieved 2026-07-25 22:00 UTC via api.weather.gov.
