Today will be dangerously hot, with the heat indices above 100 across Mississippi. Northern MississippiToday will be sunny with patchy fog in the morning. Central MississippiIt will be sunny with patchy morning fog and a chance of afternoon showers and thunderstorms. Southern MississippiToday will be sunny, with patchy morning fog and a slight chance of afternoon showers and thunderstorms. Tonight will be clear, with patchy fog after midnight and lows in the lower to mid-70s.