Excessive Heat in Illinois, July 27 to 28, 2023

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Peoria County, Peoria International Airport recorded high temperatures of 98 degrees on both July 27 and July 28, a maximum dewpoint of 82 degrees on July 27, and a maximum heat index of 110 degrees on July 27. A 53 year old woman in Peoria was found deceased in her apartment on July 27. She had pre-existing health conditions and the electricity had been shut off since July 7, so there was no air conditioning present.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Champaign County, Willard Airport recorded high temperatures of 93 degrees on both July 27 and July 28, a maximum dewpoint of 82 degrees on July 27, and a maximum heat index of 114 degrees on July 27. The Rantoul Airport observed a maximum heat index of 109 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Christian County, the Taylorville Airport recorded a high temperature of 93 degrees on July 27 and 94 degrees on July 28. The maximum heat index observed at the Taylorville Airport was 116 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Cass County, a mesonet one mile southeast of Beardstown measured a heat index of 124 degrees on July 27, also measured a heat index over 110 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Clark County, a mesonet near Marshall measured a heat index of 118 degrees on July 27, also measured a heat index over 110 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Clay County, the Flora Municipal Airport recorded a maximum heat index of 113 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Coles County, the Coles County Airport recorded a maximum heat index of 109 degrees.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. The Crawford County Airport measured a maximum heat index of 110 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. Mesonet stations across central and southeastern Illinois measured maximum heat indices in excess of 115 degrees.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In De Witt County, a mesonet in Lane measured a heat index of 119 degrees on July 27, and was also over 115 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Douglas County, a mesonet east of Arcola measured a heat index of 123 degrees on July 27, and the heat index was also over 115 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. Mesonet stations across central and southeastern Illinois measured maximum heat indices in excess of 115 degrees.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. Mesonet stations across central and southeastern Illinois measured maximum heat indices in excess of 115 degrees.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. Mesonet stations across central and southeastern Illinois measured maximum heat indices in excess of 115 degrees.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. The Effingham County Airport measured a maximum heat index of 114 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Fulton County, a mesonet station west of Lewistown measured a heat index of 119 degrees on July 27, and also measured a heat index over 115 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Jasper County, a mesonet station near Newton measured a heat index of 120 degrees on July 27, and also measured a heat index over 110 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Knox County, the Galesburg Municipal Airport measured a maximum heat index of 120 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Lawrence County, the Mount Carmel Municipal Airport measured a heat index of 114 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. The Logan County Airport measured a maximum heat index of 115 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Macon County, the Decatur Airport measured a peak dewpoint of 84 degrees and a maximum heat index of 120 degrees, both on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Marshall County, a mesonet station in Henry measured a maximum heat index of 116 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In McLean County, the Central Illinois Regional Airport in Bloomington measured a maximum heat index of 112 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Mason County, a mesonet station in Topeka measured a maximum heat index of 115 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Menard County, a mesonet station in Tallula measured a maximum heat index of 119 degrees on July 27, and also measured a heat index over 110 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Morgan County, the Jacksonville Airport measured a maximum heat index of 113 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Moultrie County, a mesonet station west of Sullivan measured a maximum heat index of 118 degrees on July 27, and also measured a heat index over 110 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Richland County, a mesonet station north of Olney measured a maximum heat index of 114 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Sangamon County, Capitol Airport in Springfield measured a peak dewpoint of 82 degrees and a peak heat index of 117 degrees, both on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Schuyler County, a mesonet station southeast of Rushville measured a maximum heat index over 115 degrees on July 27 and July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Scott County, a mesonet station in Winchester measured a maximum heat index of 120 degrees on July 27, and also measured over 110 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Shelby County, a mesonet station near Shelbyville measured a maximum heat index of 120 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Tazewell County, mesonet stations near Pekin, South Pekin, and Washington measured peak heat indices of 116, 117, and 122 degrees, respectively, on July 27. These same sites all also measured heat indices over 110 degrees on July 28.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. The Vermilion Regional Airport near Danville measured a maximum heat index of 111 degrees on July 27.

A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Woodford County, a mesonet in Metamora measured a maximum heat index of 116 degrees on July 27 and July 28.