UPDATE: EXTREME HEAT WARNING issued for the KJAN listening area from 1-p.m, Sunday until 9-p.m. Tuesday.

* WHAT…Dangerously hot conditions with heat index values up to 110 expected.

* WHERE…Portions of northwest, western, central and southern Iowa.

* WHEN…From 1 PM Sunday to 9 PM CDT Tuesday.

* IMPACTS…Heat related illnesses increase significantly during extreme heat and high humidity events.

* ADDITIONAL DETAILS…Excessive heat will persist through much of next week, potentially including the 4th of July weekend.

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.