An Excessive Heat Warning is in effect until 8pm Wednesday (6/15) for Keokuk County.  The National Weather Service is predicting that this afternoon’s heat index will range from 100 to 110.  This extreme heat plus high humidity will increase the possibility of heat-related illnesses, especially if you’re working outside.  The best advice is to drink plenty of fluids, stay in an air conditioned area. If you’re working outside, take frequent breaks in the shade.  Also, young children and pets should not be left unsupervised in a car under any circumstances.  Temperatures in the rest of the No Coast Network listening area will still be in the 90s Wednesday and there’s a chance of showers and thunderstorms starting late in the afternoon. Once again, an Excessive Heat Warning is in effect until 8pm Wednesday for Keokuk County and areas to the east.