InsideClimate: When the federal government released updated flood maps for the New York City region last week, residents were shocked to find that the number of houses and businesses in the region's flood zone had doubled since the maps were last revised, in 1986. But it now appears that those maps might have underestimated the extent of New York's flood risk, because they don't factor in the effects of future climate change. Scientists say that by the 2080s, sea levels off the city's coast could rise by as much...