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The Boston Globe

Business

FEMA’s new flood map reaches deep into city

New federal maps for Boston significantly expand the number of homes and businesses in areas considered at high risk of flooding, a change that could force thousands of property owners to purchase expensive insurance and complicate redevelopment along the city’s waterfront.

The proposed maps, released Friday by the Federal Emergency Management Agency, could more than double the number of residences considered in danger of flooding to about 18,000 from 8,000. The number of businesses affected would also balloon from 250 located primarily along the city’s wharfs to nearly 4,000 stretching as far inland as downtown Boston and encompassing much of the new development along the South Boston Waterfront.

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