This app maker says his work saved thousands during Hurricane Harvey — and he’s not done yet

Matthew Marchetti was among thousands of Houstonians motoring through the turbulent, murky stormwaters of Hurricane Harvey as the sun set on August 27th, 2017. He was sitting in a stranger’s dinky motorboat, attempting to rescue neighbors and shuttle them to safety. The problem was that he didn’t know where to look — neither did the police and fire departments.“It was a big ol’ mess,” Marchetti says. As he disembarked to high ground, he phoned his friend Nate