Sunday’s going to be a very hot day across the area, with extreme heat expected across the Charleston metro especially as we get into the afternoon. The overnight and morning really won’t offer much relief, with air temperatures in the upper 70s to low 80s for lows expected. This could keep heat indices over 90° especially closer to the coast, including downtown, for much of the night. Once the sun comes up, we’ll warm up very quickly; heat indices should be over 100° by 10-11am. Air temperatures should peak near 100° in the afternoon, and if we reach the triple digits at the airport, it’ll at least tie a record high (100°, set in 2005) as well as the first time since May 27, 2019 that the high temperature reached the century mark in Charleston. Mix in humidity…..