(KLZA)-- A heat advisory is in effect until 7:00 this evening for extreme Southeast Nebraska and until 8 p.m. for Brown, Doniphan, Nemaha and Atchison counties in Northeast Kansas and the Northwest Missouri counties of Holt and Atchison.

The combination of hot temperatures and high humidity may cause heat illness. With this being the first very hot weather of the year, heat illness can occur more easily than normal.

Be sure to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check up on relatives and neighbors.