 More on these stories at townhall.com. WCBM Baltimore. Excessive heat warning remains in effect until 8 this evening. The high temperature will hover close to 100 wrapping up the afternoon. The heat index around 110 with a slight chance for a thunderstorm and then some clouds overnight with a low of 77. A sunny end to the weekend tomorrow with a high of 96. Then some afternoon storms Monday with a high of 94.