No, but they do, typically, operate at lower speeds. In really, really bad storms (like on 8/8/2007), the subway can shut down. On 8/8/07, 3 inches of rain fell

No, but they do, typically, operate at lower speeds. In really, really bad storms (like on 8/8/2007), the subway can shut down. On 8/8/07, 3 inches of rain fell in one hour, and a tornado hit Brooklyn, causing most subway lines to be severely delayed or completely shut down.