Heat Advisories and Extreme Heat Watches have been issued across Kansas, Missouri, Illinois, Iowa, Nebraska, and South Dakota, with heat index values reaching 105 to 110°F in some areas. The National Weather Service warns that prolonged exposure—especially in
For days, the heat isn’t just coming—it’s hanging around.
Across much of the central United States. the National Weather Service has issued Heat Advisories and Extreme Heat Watches that extend through next week and into the July 4 weekend. In many locations. heat index values are expected to top 100°F. with several areas forecast to reach peak values between 105 and 110°F.
The message from the weather service is blunt: prolonged exposure can significantly increase the risk of heat-related illnesses. particularly during the afternoon and early evening when apparent temperatures run highest. The forecast also calls for unusually warm overnight conditions that can limit overnight cooling. leaving people to face cumulative heat stress over successive days.
Kansas
In Kansas, Heat Advisories are in effect from 13:00 CDT Sunday, June 28, until 21:00 CDT Wednesday, July 1, across central, east-central, south-central, and southeast Kansas. Forecasters expect heat index values of 38 to 41°C (100 to 105°F) in those areas.
An Extreme Heat Watch covers north-central. northeast. and east-central Kansas from Sunday afternoon through Tuesday evening. June 30. with peak heat index values potentially reaching 42°C (108°F). Eastern Kansas. including areas near the Missouri border. is also included in a broader Extreme Heat Watch covering adjacent portions of Missouri through Tuesday evening.
Illinois and Missouri
Heat Advisories cover broad areas of southern, central, and western Illinois as well as central, eastern, northeastern, southeastern, and western Missouri. Those advisories run from Sunday afternoon, June 28, through Thursday night, with daily heat index values above 38°C (100°F) expected.
They go into effect between 12:00 and 13:00 CDT on Sunday, June 28, and remain in effect until either 20:00 CDT or 00:00 CDT Friday, July 3, depending on the forecast area.
Alongside that, an Extreme Heat Watch is in effect for the St. Louis metropolitan region—from Sunday afternoon, June 28, through Thursday evening, July 2—covering Madison, Monroe, and St. Clair counties in Illinois and Jefferson, St. Charles, St. Louis County, and St. Louis City in Missouri. Heat index values of 41 to 43°C (105 to 110°F) are possible.
Additional Extreme Heat Watches cover northeast Missouri and portions of western Illinois from Sunday afternoon through Tuesday evening, June 30.
Iowa
In Iowa, Heat Advisories begin at 13:00 CDT Sunday, June 28, across northwest, west-central, and southwest Iowa. Depending on location, the advisories remain in effect until either 21:00 CDT Monday, June 29, or 21:00 CDT Tuesday, June 30. Heat index values are forecast to generally range from 39 to 41°C (103 to 105°F).
Much of Iowa is also under an Extreme Heat Watch from Sunday afternoon through Tuesday evening, June 30.
Southwest Iowa is included in a separate watch for the Omaha metropolitan area, where heat index values may approach 42°C (108°F).
Nebraska and South Dakota
In Nebraska, Heat Advisories start going into effect at 13:00 CDT Sunday, June 28. Advisories for eastern and southeastern Nebraska remain in effect until 21:00 CDT Tuesday, June 30, while Cedar and Knox counties in northeast Nebraska are under a shorter-duration advisory until 21:00 CDT Sunday.
In southeast South Dakota, most advisories remain in effect from 13:00 CDT Sunday until 21:00 CDT Monday. Bon Homme, Hanson, Hutchinson, and McCook counties are under a one-day advisory ending at 21:00 CDT Sunday.
Heat index values across these areas are expected to reach 39 to 41°C (103 to 105°F).
Douglas and Sarpy counties in Nebraska, together with adjacent counties in southwest Iowa, are also under an Extreme Heat Watch from Sunday afternoon through Tuesday evening, June 30, with heat index values may reach 42°C (108°F).
What this means for people
The warning isn’t just about how hot it will feel—it’s about what repeated, sustained conditions can do. The National Weather Service notes that apparent temperatures are highest during the afternoon and early evening, when people may still be outdoors and working around peak heat.
It also points to the danger of nights that don’t cool off much. Several forecast areas are expected to experience unusually warm overnight conditions that limit overnight cooling and increase cumulative heat stress over successive days.
Across the affected areas, residents are urged to remain hydrated, limit strenuous outdoor activity during the hottest part of the day, seek air-conditioned environments whenever possible, and continue monitoring official forecasts for additional advisories, watches, or warnings.
The heat watch calendar stretches across multiple states—Kansas, Missouri, Illinois, Iowa, Nebraska, and South Dakota—turning what’s usually a seasonal headline into a weeklong routine of staying safe in the heat.
Extreme Heat Watch Heat Advisory National Weather Service Illinois heat Missouri heat Kansas heat Iowa heat Nebraska heat South Dakota heat heat index July 4 weekend
105-110?? That’s insane. My AC better survive July 4.
They keep saying “prolonged exposure” like people have a choice to just not be outside. I don’t get how nights are still warm too, it’s like the heat never leaves.
So is this the same heat wave from like last week? My cousin said it’s from the “dry smoke” stuff not just weather. Either way, sounds like we’re gonna be cooked till July 4.
Heat index 38 to 41°C?? That seems wrong though because 41°C is way hotter than 105°F or whatever. Not saying they’re lying, I just hate when the units get mixed up. Also everyone keeps pretending overnight cooling matters but I swear it still feels like a sauna at 2am.