 Now to 7 News First Alert meteorologist Mark Pena. Just a few clouds to start your Monday morning, but it's noticeably more muggy outside thanks to a surge of moisture over the area overnight. Now this is going to make our forecast high of about 100 degrees feel about 10 degrees hotter. 110 for the heat index value later. This is why the National Weather Service will issue an excessive heat warning beginning at 11 a.m. lasting until 8 p.m. So remember those heat safety tips.