Douglas County warns of dangerous heat advisory Tuesday, heat index near 105

Douglas County residents faced dangerous heat Tuesday as the National Weather Service posted a heat advisory from noon until 9 p.m. CDT, with heat indices forecast to reach around 105 degrees. The Douglas County Sheriff's Office urged people to prepare for the combination of high temperatures and humidity, which can quickly turn dangerous for anyone working, playing or commuting outdoors in Lawrence and across northeast Kansas.

The National Weather Service Topeka Forecast Office said the advisory covered the entire area and warned people to avoid strenuous outdoor activity Tuesday afternoon and early evening, when conditions were expected to be the worst. Its Douglas County forecast page listed current conditions at Lawrence Municipal Airport, underscoring how local weather monitoring was tracking the day hour by hour as temperatures climbed.

Weather officials said the heat index measures how hot it really feels when humidity is factored in with air temperature, and that alerts are issued when those values are expected to reach dangerous levels. In northeast Kansas, that danger included heat cramps, heat exhaustion and heat stroke. The National Weather Service said heat stroke is an emergency, and anyone overcome by heat should be moved to a cool, shaded location right away.

The advisory landed on top of a Hazardous Weather Outlook that already had Douglas County and other northeast Kansas counties under watch for hazardous conditions. That outlook also flagged a Flood Watch from 7 p.m. Monday into the overnight hours, along with the possibility of thunderstorms later in the week, a reminder of how quickly weather can swing from flooding rain to oppressive heat in the same stretch of days.

The heat also fit a wider regional pattern. Kansas City, Missouri, saw its first heat advisory of the year Tuesday, running from noon to 10 p.m., according to local reporting, suggesting an early-summer surge of dangerous heat across the area. In Douglas County, the highest-risk window ran through the afternoon and early evening, before the advisory expired at 9 p.m. CDT.