* WHAT...DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES UP TO 108SOUTHWEST IOWA AND THE OMAHA METRO.

* WHERE...IN IOWA, FREMONT, MILLS, MONTGOMERY, PAGE, POTTAWATTAMIE, AND SHELBY COUNTIES. IN NEBRASKA, DOUGLAS AND SARPY COUNTIES.

* WHEN...UNTIL 9 PM CDT TUESDAY.

* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING EXTREME HEAT AND HIGH HUMIDITY EVENTS.

* ADDITIONAL DETAILS...OVERNIGHT HEAT INDICES IN THE UPPER-70S WILL MAKE IT DIFFICULT FOR HOMES WITHOUT AIR CONDITIONING TO COOL DOWN. HOT WEATHER IS EXPECTED TO PERSIST THROUGH THE WEEK.