To understand the flood risks for your district, turn on both the SLR-FHA and historic district layers. The Map Service Center has a hotline for specific questions: 1-877-336-2627. The BPDA Zoning map includes the Sea Level Rise Flood Hazard Area (SLR-FHA) and FEMA Special Flood Hazard Area (SFHA), and also Boston’s historic and landmark districts. Flood Risk Reports summarize flood hazard and risk exposure to a community. This page is for homeowners who want to understand how their current effective Flood Map may change when the preliminary FEMA maps becomes effective. The city tool is not the first interactive to overlay coastal flooding risk on a Boston map, but it's the first to use localized data from the state's Boston Harbor Flood Risk Model. Map of the United States indicating high risk flood areas with sea level rise. Users can simulate inundation associated with one to six feet of sea level rise at various scales along the contiguous United States coast, except for the Great Lakes. 2050 Sea Level Rise; 2100 Sea Level Rise; 2050 Sea Level Rise + Major Storm; Preliminary Massachusetts Flood Maps New and Preliminary Massachusetts Flood Maps provide the public an early look at a home or community’s projected risk to flood hazards. Flood-resistant construction must be used in at least the 1%-chance floodplain (formerly referred to as the 100-year floodplain.) This map viewer illustrates the scale of potential coastal flooding after varying amounts of sea level rise. To begin, select a flooding scenario. A map showing sea level rise scenarios and affected properties and infrastructure in Boston. Bathymetric map, ocean depth. To examine the FEMA flood maps, go to: https://msc.fema.gov/portal. And, FEMA’s maps now take wave crest levels into account. UNDERSTANDING FLOOD RISKS Use the BPDA Zoning Map to find your flood risk. In conjunction with the FIS report, it explains in detail the methodology and results of a Flood Insurance Rate Map. Sea level rise map. Moderate risk areas within the 0.2-percent-annual-chance floodplain, areas of 1-percent-annual-chance flooding where average depths are less than 1 foot, areas of 1-percent-annual-chance flooding where the contributing drainage area is less than 1 square mile, and areas protected from the 1-percent-annual-chance flood by a levee. The report findings are “based on CoastalDEM, a … FEMA engineer Kerry Bogdan says flood zones have changed because of sea level rise and more precise topographical data. Flood Factor is a free online tool created by the nonprofit First Street Foundation that makes it easy for Americans to find their property’s past floods, current risks, and future projections based on peer-reviewed research from the world’s leading flood modelers. Climate Central. 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