A new Heat Advisory has been issued from Noon til 7 PM (Eastern) Sunday for areas highlighted below in orange. A Heat Advisory means the temperature and humidity will be high enough as to be hazardous to your health. 

The heat index, or what the air feels like, should peak between 105º and 108º in the hottest part of the afternoon Sunday. 

Here is the text issued by the local National Weather Service office with this Advisory:

..HEAT ADVISORY IN EFFECT FROM NOON EDT /11 AM CDT/ TO 7 PM EDT
/6 PM CDT/ SUNDAY...

* WHAT...HEAT INDEX VALUES UP TO 108 EXPECTED.

* WHERE...SOUTHERN INDIANA AND PORTIONS OF CENTRAL KENTUCKY.

* WHEN...FROM NOON EDT /11 AM CDT/ TO 8 PM EDT /7 PM CDT/ 
  SATURDAY. 

* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT 
  ILLNESSES TO OCCUR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS
EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY
WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE
POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN AIR-CONDITIONED
ROOM.