a line of sycamore trees in this park split in half. the massive branches crashing down and crushing cars below. the heavy rain quickly flooding roads and trapping drivers close to interstate 76 near philadelphia. >> they were scared. she thought she was going to drown. >> reporter: outside washington, d.c., two cars with multiple people inside swept off the road. some clinging to trees, one on the roof. teams rescuing them with rafts and an airboat. no one seriously hurt. and across the northeast, multiple tornado warnings. >> hurry up, it's right here. >> reporter: this funnel cloud spotted in ocean city, new jersey. and homes throughout this delaware neighborhood torn apart. >> but the really bad part of this area is this house right here, but the whole back of the house is gone. >> i saw the tree lifting up out of the ground and at that point, that's when i saw the whole back of the house coming off of the property. first thought is, thank god that we're here, god spared my wife