National Weather Service

Dangerously high temperatures will stick around until midweek.

Oppressive heat index readings are forecast through Thursday.

The tornadoes damaged buildings, brought down trees and left many with power.

The National Weather Service has already been forced to reduce launches of weather balloons in some locations.

A winter weather advisory is in effect for much of central Illinois until Wednesday morning.

An excessive heat warning is in effect through Friday.

Wednesday's rain led to flash flooding in the area.

Heavy rain, frequent lightning, hail and strong winds were also reported.

The National Weather Service says heat index readings of up to 110 is expected through Saturday.