>> reporter: as ida's torrential rain pounded new york city, officers frantically tried to reach this flooded basement but when specialized rescue teams got there, it was too late three people had already drowned. >> this storm has now rewritten the maps we used to think flooding was a coastal thing. it's not anymore. >> reporter: in a city where affordable housing is hard to come by, the storm's aftermath is raising new questions about whether the northeast is prepared for climate change, and whether local officials gave enough warning. >> the water got all the way up here. >> up to the windo...