 Your WDEL Weather Center forecast sponsored by Advance Roofing. Windows, siding, doors, and decks. Discover more at AdvanceMyHome.com. For today, excessive heat warning remains in place today and tomorrow. For today, sunny skies, 30% chance of some heavy rain later. High 97. 40% chance of rain tonight. A low just 77 degrees. Tomorrow, increasing chances of rain. We get to 95.