Hazardous heat conditions expected through Wednesday

(9:05 p.m. Monday announcement)

[June 23, 2009]  A summertime air mass has become entrenched over central Illinois and will remain in the area into the middle of the week. Hot temperatures will combine with the humidity to produce afternoon heat index vales between 100 and 105. Winds will be too weak to provide much relief from the oppressive heat. Nighttime conditions will also be very muggy with little breeze.

A heat advisory remains in effect until 7 p.m. Wednesday for the counties of Knox, Stark, Peoria, Marshall, Woodford, Fulton, Tazewell, McLean, Schuyler, Mason, Logan, DeWitt, Piatt, Champaign, Vermilion, Cass, Menard, Scott, Morgan, Sangamon, Christian, Macon, Moultrie, Douglas, Coles, Edgar, Shelby, Cumberland, Clark, Effingham, Jasper, Crawford, Clay, Richland and Lawrence, including the cities of Galesburg, Peoria, Bloomington, Normal, Havana, Lincoln, Champaign, Urbana, Danville, Jacksonville, Springfield, Taylorville, Decatur, Charleston, Mattoon, Shelbyville, Effingham, Flora and Lawrenceville.

High temperatures Tuesday and Wednesday will again climb into the lower and middle 90s. When combined with the high moisture content of the atmosphere, heat index values between 100 and 105 will result. Muggy conditions will continue during the overnight hours, with lows from 70 to 75 and high humidity.

Precautionary, preparedness actions

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

[Text from file received from the Emergency Email Network]