A well-meaning but ill-informed blogger blames the Pennsylvania floods on global warming. You'd think there has never been a big flood in that state before the climate started to change.
If the 1889 Johnstown Flood isn't good enough for you, how about 1972's Hurricane Agnes? That one took away all our lawn furniture from our creek-bordered yard in southwestern Pennsylvania. (It also caused a major rift between my grandmother and my great uncle when she said, about his Volkswagen beetle parked in our driveway, "You'd better get that god damned thing out of here before it floats away." But I think they must have had some problems going on before that.)