 Your WDEL Weather Center forecast. There is an excessive heat warning in place today and tomorrow, followed by an excessive heat watch on Wednesday. For today, we start out with patchy fog, 30% chance of some heavy rain. High today, 95. Tonight, low down to 76, 30% chance of heavy rain before things clear out. Tomorrow, simply put, hot, high 97. Then on Wednesday, 20 to 50% chance of rain, thunderstorms, high 93.