Creation of a flood risk area map showing both the rainfall risk area and the coastal flood risk area.

This bill would require the Department of Environmental Protection (“DEP”), in consultation with the Department of Buildings and Office of Long-Term Planning and Sustainability, to promulgate a rule to adopt an interim flood risk area map, showing the 10-year rainfall risk area, which includes locations in the city where there is a 10 percent chance or greater of rainfall-induced flooding in any year, incorporating the impacts of the projected 2050 sea level rise on sewer outfalls and storm drains as projected by the New York City Panel on Climate Change, and the coastal flood risk area, which includes locations in the city where there is a 1 percent chance or greater of flooding in any year, incorporating the impacts of sea level rise as projected for the year 2080 by the New York City Panel on Climate Change. The bill would require such interim map to be posted to the city’s website for at least 1 year after adoption. Additionally, the bill would require DEP to update the 10-year rainfall risk area no later than January 1, 2028, and require DEP to update both the 10-year rainfall risk area and coastal risk area within 1 year of the issuance of a new effective flood insurance rate maps for the City by the Federal Emergency Management Administration. DEP may further update such risk areas in the future. Finally, the bill would require such updated maps to be posted to the department’s website, and to include the location of the special flood hazard area, as defined by Appendix G of the New York City Building Code, the bounds of the 10-year rainfall flood risk area at either a block or individual property level, and general elevation or topography indicators for both the 10-year rainfall flood risk area and coastal flood risk area.