A strong and very persistent high in the upper levels of the atmosphere was responsible for seven consecutive days of heat indices at or above 105 degrees. The high was centered over the Lower Ohio Valley for the first few days of the heat wave, then it shifted slightly southward and weakened. The summer as a whole was among the hottest on record. The heat index peaked mainly between 105 and 111 degrees at the Marion and Carbondale airport sites during each afternoon of the event. Similar values were observed elsewhere. Heat indices during the early morning hours were mostly in the mid to upper 80's. Hospitals reported that cases of heat exhaustion were quite low. Seven heat-related illnesses were treated at a Mount Vernon hospital. Only a few cases were reported in the Harrisburg area. Heat illness information was not available from other hospitals.

Excessive Heat in UNION, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WABASH, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WAYNE, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WHITE, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WILLIAMSON, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in ALEXANDER, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in EDWARDS, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in FRANKLIN, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in GALLATIN, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in HAMILTON, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in HARDIN, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JACKSON, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JEFFERSON, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JOHNSON, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in MASSAC, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in PERRY, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in POPE, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in PULASKI, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in SALINE, ILLINOIS
From 09-AUG-10 10:00:00 to 15-AUG-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS