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Property owners in flood zones can find out today whether their homes or businesses have to be raised to avoid higher insurance costs and to prevent damage or destruction from future storms.
The updated maps, some two years in the making and scheduled for release next year, were expedited because of Sandy.
Ryan Pietramali, risk analysis branch chief for FEMA, said the new levels are based on improved technology that allows scientists to better understand high wind and wave action. The previous flood maps, he said, are based on data that is up to 30 years old.