Summers in New York bring the smell of barbecue, speakers blaring at block parties, and sweaty treks to cool off at a pool or the beach. Increasingly, warmer weather here also means subways flooded by sudden downpours. Videos of water gushing through subway stations and trains have become a familiar sight for New Yorkers lucky enough not to experience such events first-hand. This year has been no exception. In just one hour on Monday evening, two inches of rain poured onto New York City—its