...HOT AND HUMID CONDITIONS LIKELY...

A STRONG UPPER LEVEL HIGH PRESSURE SYSTEM OVER THE CENTRAL PLAINS
WILL BUILD EAST INTO THE REGION PROVIDING A HOT AND HUMID AIRMASS
INTO NORTHERN ILLINOIS AND NORTHWEST INDIANA SUNDAY...AND CONTINUE
THROUGH MUCH OF NEXT WEEK.

HEAT AND HUMIDITY WILL STEADILY BUILD SUNDAY THROUGH NEXT WEEK AS
AFTERNOON HIGH TEMPERATURES CLIMB INTO THE 90S. HEAT INDICES
ON SUNDAY WILL APPROACH 100 DEGREES...THEN WARMER ON MONDAY TO
100 TO 105 DEGREES. TUESDAY SOME RELIEF FROM THE HEAT IS
POSSIBLE...ESPECIALLY CLOSER TO LAKE MICHIGAN.

HEAT IS THEN FORECAST TO REBUILD BACK INTO THE REGION DURING THE
MIDDLE TO END OF THE WEEK WITH HIGHS RETURNING TO THE 90S WITH
HEAT INDICES OVER 100 DEGREES POSSIBLE AGAIN.

DURING VERY HOT WEATHER IT IS CRITICAL TO STAY HYDRATED BY
DRINKING PLENTY OF WATER. STRENUOUS OUTDOOR ACTIVITIES SHOULD BE
SCHEDULED DURING THE EARLY MORNING OR EVENING HOURS. WEAR LIGHT
WEIGHT AND LOOSE FITTING CLOTHING...AND REMAIN IN AIR CONDITIONED
LOCATIONS.

STAY TUNED TO NWS CHICAGO OR YOUR LOCAL MEDIA OUTLETS FOR FORECAST
UPDATES AND STATEMENTS ON THIS DEVELOPING HEAT WAVE.