A strong heat dome over the Midwest resulted in a six-day stretch of dangerous heat and humidity, which began on August 20 and continued through August 25. High temperatures were routinely above 90 degrees, while afternoon dewpoints were near 80 degrees, resulting in heat indices exceeding 110 degrees. During the overnight hours, lows only fell into the upper 70s, keeping heat indices in the 80s.

Excessive Heat in LAWRENCE, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Lawrenceville Airport (KLWV) recorded a maximum heat index of 121 degrees on both August 24 and August 25. The AWOS at the Mount Carmel Airport (KAJG) recorded a maximum heat index of 119 degrees on August 25.

Excessive Heat in LOGAN, ILLINOIS
From 20-AUG-23 13:00:00 to 20-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Logan County Airport (KAAA) recorded a maximum heat index of 120 degrees on August 23. Additionally, the National Weather Service in Lincoln recorded a record warm low temperature of 77 degrees on August 24.

Excessive Heat in MACON, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Decatur Airport (KDEC) recorded a heat index over 110 degrees each day during the heat wave, with a maximum heat index of 119 degrees on August 21.

Excessive Heat in MASON, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station two miles southeast of Topeka and a mesonet station in Snicarte both recorded maximum heat indices of 120 degrees on August 23.

Excessive Heat in CHAMPAIGN, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. Willard Airport (KCMI) recorded a maximum heat index of 116 degrees on August 24. Also on August 24, the AWOS at the Rantoul Airport recorded a maximum heat index of 117 degrees.

Excessive Heat in SANGAMON, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Capital Airport (KSPI) recorded a maximum heat index of 117 degrees on August 23.

Excessive Heat in VERMILION, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Vermilion County Airport (KDNV) recorded a maximum heat index of 116 degrees on August 24.

Excessive Heat in CASS, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station two miles southeast of Beardstown recorded a maximum heat index of 132 degrees on August 23.

Excessive Heat in CLARK, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station in Marshall recorded a maximum heat index of 119 degrees on August 24.

Excessive Heat in DE WITT, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station in Lane measured a maximum heat index of 123 degrees on both August 23 and August 24.

Excessive Heat in FULTON, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station near Lewistown measured a maximum heat index of 128 degrees on August 24.

Excessive Heat in JASPER, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station in Newton measured a maximum heat index of 122 degrees on August 25.

Excessive Heat in MCLEAN, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Central Illinois Regional Airport (KBMI) recorded a maximum heat index of 116 degrees on August 23.

Excessive Heat in MORGAN, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Jacksonville Airport (KIJX) recorded a maximum heat index of 116 degrees on August 24.

Excessive Heat in TAZEWELL, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station four miles west of Washington recorded a peak heat index of 114 degrees on August 23.

Excessive Heat in PEORIA, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. Peoria International Airport (KPIA) recorded a peak heat index of 121 degrees on Wednesday, August 23, which was the highest ever recorded at the airport. Records date back to 1948. The Peoria Airport also set record warm low temperatures of 77 and 78 degrees on August 23 and August 24, respectively.

Excessive Heat in CLAY, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Flora Airport (KFOA) recorded a heat index over 110 degrees each day, including a maximum heat index of 119 degrees on August 24.

Excessive Heat in COLES, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Coles County Airport (KMTO) recorded a maximum heat index of 113 degrees on August 24.

Excessive Heat in DOUGLAS, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station two miles west of Arcola measured a maximum heat index of 124 degrees on August 24.

Excessive Heat in MENARD, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station near Tallula measured a maximum heat index of 118 degrees on both August 23 and August 24.

Excessive Heat in CHRISTIAN, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Taylorville Airport (KTAZ) recorded a maximum heat index of 115 degrees on August 24.

Excessive Heat in EFFINGHAM, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Effingham Airport (K1H2) recorded a maximum heat index of 117 degrees on August 24.

Excessive Heat in RICHLAND, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station one mile northwest of Olney recorded a maximum heat index of 121 degrees on August 25.

Excessive Heat in MOULTRIE, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station near two miles southwest of Sullivan measured a maximum heat index of 119 degrees on August 24.

Excessive Heat in SCHUYLER, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station near Rushville recorded a maximum heat index of 122 degrees on August 23.

Excessive Heat in SCOTT, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station near Winchester recorded a maximum heat index of 123 degrees on August 23.

Excessive Heat in EDGAR, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight.

Excessive Heat in KNOX, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Galesburg Airport (KGBG) recorded a heat index over 110 degrees each day, with a maximum heat index of 128 degrees on Wednesday, August 23.

Excessive Heat in CRAWFORD, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Robinson Airport (KRSV) recorded a maximum heat index of 115 degrees on August 25.

Excessive Heat in SHELBY, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station in Shelbyville recorded a maximum heat index of 124 degrees on August 24.

Excessive Heat in STARK, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station in two miles north of Speer recorded a maximum heat index of 123 degrees on August 24.

Excessive Heat in WOODFORD, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station in Metamora recorded a maximum heat index of 125 degrees on August 23.

Excessive Heat in CUMBERLAND, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight.

Excessive Heat in PIATT, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight.

Excessive Heat in MARSHALL, ILLINOIS
From 20-AUG-23 13:00:00 to 25-AUG-23 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. The Marshall County Airport (KC75) recorded a maximum heat index of 113 degrees on August 23.