Delmarva will experience humid, foggy nights and a stretch of unsettled weather through midweek. Beginning Sunday night, areas of mist and patchy fog will develop, especially along the coast. A cold front approaching late Monday will trigger showers and thunderstorms, with the primary concern being heavy rain and flash flooding. While the severe thunderstorm risk is low, locally gusty winds cannot be ruled out. The front is expected to stall through Wednesday, keeping rain chances high before heat and humidity surge again later in the week.