This is the 100-Year Floodplain for the 2020s based on FEMA's Preliminary Work Map data and the New York Panel on Climate Change's 90th Percentile Projects for Sea-Level Rise (11 inches). (Represented as dark blue).
This is the 500-Year Floodplain for the 2050s based on FEMA's Preliminary Work Map data and the New York Panel on Climate Change's 90th Percentile Projects for Sea-Level Rise (31 inches). (Represented in light purple).
To become more familiar with Mapbox's customized styles and tilesets, I designed a world map to visualize the projected sea water rise due to climate change in New York City. There is a tremendous resource of geological elevation data that can be used to reveal exactly which areas are at the greatest risk of sea water rise. In this small example of New York City projections, I overlaid two shape file layers that show conservative estimates of water rise by the year 2020 and by 2050.