An Extreme Heat Warning is in effect right now for four Kansas counties: Bourbon, Doniphan, Atchison, and Republic. The warning was issued September 5, 2026, at 4:08 PM CDT and remains active through September 6, 2026, at 8:00 PM CDT. Residents in these counties are under an elevated heat risk during that entire window, and conditions should be treated as a serious threat to health and safety.
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The warning was issued jointly by the National Weather Service offices in Springfield, Missouri; Kansas City/Pleasant Hill, Missouri; and Topeka, Kansas. Three separate NWS offices coordinating on a single event underscores the geographic reach of this heat pattern and the seriousness with which forecasters are treating it.
What the National Weather Service Is Telling You to Do Right Now
The National Weather Service instruction for this Extreme Heat Warning is direct and specific. Residents in Bourbon, Doniphan, Atchison, and Republic counties should drink plenty of fluids throughout the day, stay inside an air-conditioned room, and stay out of the sun for as long as the warning remains in effect, through the evening hours of September 6, 2026.
Critically, NWS is also directing people to check up on relatives and neighbors. This is not a minor add-on. Extreme heat is most dangerous for people who are isolated, elderly, very young, or who lack access to reliable cooling. A brief phone call or a knock on a neighbor’s door during a multi-hour heat event can be the difference between a close call and a fatality. If someone you know in the affected counties does not have air conditioning, now, while the warning is still active, is the time to help them find a cooled space.
Follow these NWS instructions through the full duration of the warning. The expiration time of 8:00 PM CDT on September 6 is the official threshold, but temperatures and humidity can remain dangerous for hours after a warning ends. Do not assume the risk has passed simply because the alert has been lifted.
Connecting This Event to Year-Round Preparedness
Extreme heat events like this one are acute and time-bounded, but they expose gaps in household preparedness that persist long after the alert expires. Knowing which family members or neighbors lack air conditioning, having a plan to reach them quickly, and keeping fluids stocked are low-cost actions that apply every summer, not just during a declared warning. At USRiskRadar, our fire and disaster preparedness guidance consistently shows that the households most likely to weather an acute event safely are those that have already solved the routine problems: contact lists, cooling plans, and basic supply readiness. A warning like this one is a useful prompt to close any of those gaps before the next heat event, or the next wildfire smoke event, requires them again.
For the latest official updates on this Extreme Heat Warning, monitor the National Weather Service offices in Topeka, Kansas, and Kansas City/Pleasant Hill, Missouri, directly at weather.gov. Alerts are updated in real time and should be your first source for any changes to the warning’s scope or expiration.
For the fundamentals that apply beyond this specific alert, see our Extreme Heat Preparedness guide.
Source: National Weather Service (NWS Springfield MO, NWS Kansas City/Pleasant Hill MO, NWS Topeka KS). Active alert data retrieved 2026-09-05 22:00 UTC via api.weather.gov.
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