You might want to avoid the N/Q/R lines for a bit. After a major water main break near Broadway and E. 23rd Street, the Flatiron District has turned into a giant river,reportedly flooding nearby basements and subway stations. From the MTA:
Service Change Posted: 02/01/2013 11:26AM
Due to a water condition at 23 St Station:
There is no and trains in both directions between DeKalb Av Station and 57 St-7Av Station.
There is no trains in both directions between Queens Plaza Station and Whitehall Street Station.
Both directions trains are running on the line between 36 St Station (Qns) and 34 St-Herald Sq Station, then run on the line in both directions between 34 St-Herald Sq Station and DeKalb Av Station.
Allow additional travel time.
Photo credit Jana K. Hoffman/Gothamist