Severe storms toppled trees, sparked tornado warnings, and left thousands in the dark across the Delaware Valley. The National Weather Service has confirmed an EF2 tornado touched down in Thornbury Township, Delaware County. Crews spent more than an hour trying to get to an elderly couple after a large tree fell onto their home in Ambler, Montgomery County. Straight-line winds caused damage in Warminster and Warrington, with estimated wind gusts of 110 mph, according to the National Weather Service.