Yardley Makefield Marine Rescue leaving the Yardley Boat Ramp along N. River Road heading down the Delaware River on Monday morning July 17, 2023, in Yardley, Pa. Search and rescue units are looking for two lost children caught in flood waters Saturday. (Alejandro A. Alvarez/The Philadelphia Inquirer via AP)

WASHINGTON CROSSING, Pa. (AP) — The search for a missing 2-year-old girl and her 9-month-old brother who were swept away from their car during flash flooding over the weekend carried into a fourth day. Upper Makefield Township police in a social media post thanked the countless volunteers who’ve come forward to assist but say their assistance isn’t necessary. Some 100 officials along with drones and cadaver dogs have combed the area near the creek that drains into the Delaware River. A news conference is set for Tuesday afternoon.