A large and strong high in the upper levels of the atmosphere drifted slowly east from the central Plains across the Lower Ohio Valley. This strong upper-level high brought six consecutive days of dangerously high heat and humidity. The peak heat index at Carbondale was 106 degrees on the 19th and 20th, 113 degrees on the 21st, and from 106 to 108 degrees on the 22nd, 23rd, and 24th. The peak heat index at Harrisburg was 105 degrees on the 19th, 107 on the 20th, 110 on the 21st, 107 on the 22nd, and 110 on the 24th. Low temperatures were in the mid 70's each night. Cooling centers were opened in about ten cities, including Carbondale, Cairo, Mount Vernon, Metropolis, Golconda, Mounds, Harrisburg, Marion, Carmi, and Mount Carmel.

Excessive Heat in ALEXANDER, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in EDWARDS, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in FRANKLIN, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in GALLATIN, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in HAMILTON, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in HARDIN, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JACKSON, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JEFFERSON, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JOHNSON, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in MASSAC, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in PERRY, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in POPE, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in PULASKI, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in UNION, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WABASH, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WAYNE, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in SALINE, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WHITE, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WILLIAMSON, ILLINOIS
From 19-JUL-11 11:00:00 to 24-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS