Hold on to something heavy

Seal off the subways and keep a raft of rafts handy, because we ain’t seen nothing yet. So say scientists gauging how often Gotham, which survived a superstorm five years ago, will get hit again. Storms bringing sea surges approaching Sandy’s size once arrived in New York City every 500 years. Of late, they’ve come every 25 years or so. New prediction: By 2030, they’ll arrive every five years. Ugh.