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The USGS Long Island Sound Partnership Compound Flood Hazard Web Map Application is an interactive tool developed by the U.S. Geological Survey’s New York Water Science Center that helps users explore the combined impacts of multiple flooding drivers across the New York and Connecticut coastal regions. Drivers of compound flooding included in the assessment were precipitation, coastal (storm surge, tidal), and groundwater emergence, which when combined can lead to more severe and widespread inundation than from any single cause alone.

The map visually displays hazard rankings and spatial patterns of flood drivers so that planners, emergency managers, researchers, and the public can better understand where these flood hazards are most likely to coincide, thus supporting local decision making for flood mitigation, coastal planning, and resilience strategies. The application is based on USGS models and ongoing research into regional flood processes.

The Long Island Sound Sustainable and Resilient Communities (SRC) Team held our 2025 Annual Workshop virtually as three sessions over two days. Session topics focused on resources and tools available to help take advantage of state resilience funds, a panel discussion on why and how to incorporate nature-based solutions into resilience planning, and an overview of our available assistance programs.

Session 1 – Resilience 101: Helpful Tools and Strategies for Building Community Resilience was held on Thursday, December 4, 2025. Participants learned about available resilience resources and tools and then moved into breakout rooms to hear about state climate certification programs and resilience funds in both NY and CT. Videos of the main session and both breakout rooms are available below, along with supporting materials.

The NYC Stormwater Flood Maps show areas in New York City that are at risk of flooding during heavy rain. The tool provides interactive maps that let users explore neighborhood-level flood risk and understand how stormwater might affect streets, homes, and critical infrastructure. It helps residents, planners, and local organizations identify vulnerable areas and make decisions about preparedness, emergency planning, and long-term resilience.

These maps also bring together important environmental and social data, making it easier to compare neighborhoods, see patterns, and understand which communities may face the greatest challenges during extreme weather.

The NYC Flood Hazard Mapper is an interactive tool created by the NYC Department of City Planning to help residents, businesses, and planners understand flood risks across New York City. It provides maps showing current coastal flood hazards, FEMA flood zones, and areas that may be affected by sea level rise in the future. By searching an address or exploring different map layers, users can see how flooding may impact specific neighborhoods today and under future climate conditions.

This resource is designed to support safer decision making as the frequency and severity of flooding increases. While the mapper offers valuable visual data and projections, it is meant for general information only and should not replace official FEMA resources or professional guidance. Users are encouraged to use this tool as a starting point to learn about local flood exposure and to explore how environmental changes may affect communities throughout the city.

Connecticut’s Severe Weather Mitigation and Resiliency Advisory Council was created to help the state better prepare for the growing risks of hurricanes, flooding, and other severe weather events. According to the Council and the CT Insurance Department, many Connecticut homes especially older buildings or houses in coastal and urban areas are highly vulnerable to wind and flood damage. The Council’s final report explains that severe weather is becoming more expensive for families, and many residents lack the insurance or financial resources to recover after storms. To address this, the Council recommends strengthening partnerships with programs like Energize CT, Habitat for Humanity, and the CT Green Bank, and promoting upgrades such as IBHS Fortified™ roofs, which can reduce damage from high winds. They also emphasize the need for public education about flood risk, insurance awareness, and preparedness, along with long-term actions like statewide grant programs, tax credits, and expanded training for contractors and evaluators. Together, these efforts aim to help Connecticut residents protect their homes, reduce storm damage, and build a safer, more resilient future.

You can view the complete Final Report (2025) in PDF format

This report provides on guidance on ways to adapt the Shoreline Greenway Trail to the increasing frequencies of heavy rain, wildfires, hurricanes, flood events, and storm surges. The report defines what we mean by resilience for a trail in coastal Connecticut, identifies climate impacts facing the trail now, and in the years to come, shares design suggestions that could build resiliency on existing and new sections, and explores how the trail itself can be essential to wider community resiliency.

Signed into law on November 25, 2024, the bipartisan BEACH Act (BEACH Act; Pub. L. 118-117) reauthorizes the Coastal Barrier Resources Act (CBRA) and updates maps for 454 coastal units across 13 U.S. states, including Connecticut. The revised Coastal Barrier Resources System (CBRS) maps are now effective and available through the CBRS Mapper

The BEACH Act expands eligibility for federal flood insurance and financial assistance in areas removed from the CBRS, while limiting new federal funding in areas added to the system. It also introduces new requirements for CBRA disclosures during real estate transactions, guidance for emergency coastal projects, and research initiatives on coastal barrier ecosystem dynamics.

Agencies involved:
U.S. Fish and Wildlife Service (FWS), Department of Housing and Urban Development, U.S. Army Corps of Engineers, and U.S. Geological Survey.

Search your city or state to learn the many ways a warming world is affecting your place now.

Explore these pages to learn how people in your local area are at risk in a warming world.

Find local data regarding temperatures, precipitation, sea level rise, storms, and more.

Browse climate-related graphics for all seasons localized for your area, that are available for download.

Connecticut Insurance Department CID, in Collaboration with First Street Foundation, provides climate related risk mapping tool for Connecticut residents.  This tool allows users to search Connecticut property addresses to view maps and reports that provide detailed property-specific climate risk assessments, particularly for flood, wildfire, extreme heat, and hurricane wind hazards. This free risk mapping tool allows homeowners, home buyers, small-business owners, and community leaders to identify the risks using state-of-the-art climate risk mapping technology.

This interactive map published by the CTDOT in March 2025 allows users to view data layers that make up the state-owned and maintained drainage network across Connecticut. Culvert locations are included, as well as their water source, material components, type of conveyance, diameter, length, last inspection date, and maintenance information. Note that an ArcGIS login is required to access this resource.

This fact sheet produced by the Connecticut Institute for Resilience and Climate Adaptation (CIRCA) reviews how culverts are defined in Connecticut, explains their connection to climate resilience, provides examples of how Connecticut towns are addressing needs for upgraded culverts, and highlights related resources.

This study by the Regional Plan Association assessed how flooding will threaten housing in Long Island, NYC, and Westchester County in the coming decades. It found that by 2040 as many as 1.6 million people could live in areas exposed to flooding and as many as 82,000 housing units could be lost, exacerbating housing shortages. The report includes recommendations for an integrated approach to land use planning and policy initiatives to create resilient communities.

A product of Climate Central’s Sea Level Program, Coastal Risk Finder allows users to get local flood projections, understand who and what is at risk in their communities, and learn about solutions for coastal states, counties, cities, towns, congressional districts, and state legislative districts in the contiguous U.S., with more to come. Users can download data and graphics to further their local adaptation and communication efforts related to coastal flooding. Coastal Risk Finder includes detailed briefs on adaptation efforts in coastal states and territories, providing insights into policies, projects, and key organizations working to mitigate flood risks. By highlighting actionable solutions, we aim to empower communities with the knowledge and tools needed to address coastal flooding challenges.

The accompanying User Guides highlight the most useful features and provide guidance on using the tool for specific applications. A recording of the Launch Webinar featuring expert insights is also available.

The Long Island Sound Sustainable and Resilient Communities (SRC) Team held our 2024 Annual Workshop virtually as three sessions over two days. Session topics focused on our assistance programs, new regional resilience resources and tools, and a discussion on planning for inundation and different considerations communities may face.

Session 2 – Resilience Tools was held on Tuesday, December 10th from 1:30-3:30 PM. Participants learned about new Resilience Tools being developed and used throughout coastal Long Island Sound.

Interactive map with county-level disaster declaration information and Congressional Districts for 2011-2023. Also includes a fact sheet and tables.

National Report with State-based County-level data detailing the experiences of communities as a result of climate change. State reports include eight maps that show where major disasters have occurred, where post-disaster support has been given, where the most socially vulnerable populations reside, and the energy reliability by utility area. It also provides county-level disaster data within State Assembly, Senate, and Congressional district boundaries.

Connecticut EJ Screening Tool is an interactive resource that combines both community and data-driven approach that incorporates environmental burdens and demographic indicators. This map allows users to explore the environmental health and the conditions (socioeconomic and or other distinguishing community characteristics) within a specific region, town, city, and or entire state.

The data included in this map finalize into a score that allows users to understand the relationship between the community and environmental justice. Through the presentation of this information, citizens and policymakers alike can understand what communities are experiencing and form policies that reshape these matters.

Coastal Resilience is a Connecticut-based decision support tool that provides local, regional, state and national stakeholders a step-wise process to guide decisions to reduce the ecological and socio-economic risks of coastal and inland hazards.

National Report with State-based County-level data detailing the experiences of communities as a result of climate change. State reports include eight maps that show where major disasters have occurred, where post-disaster support has been given, where the most socially vulnerable populations reside, and the energy reliability by utility area. It also provides county-level disaster data within State Assembly, Senate, and Congressional district boundaries.

This mapper, developed through the New York Climate Act, was developed by the State Climate Justice Working Group to identify disadvantaged communities to ensure that frontline and otherwise underserved communities benefit from the state’s historic transition to cleaner, greener sources of energy, reduced pollution and cleaner air, and economic opportunities. The interactive map identifies areas throughout the State that meet the disadvantaged community Criteria as defined by the Climate Justice Working Group.

Use this mapper to visualize people, infrastructure, and natural resources exposed to coastal flood hazards. You can save and share the online maps to communicate with stakeholders. Tip: watch the short video about the tool before getting started!

Neighborhoods at Risk is an easy-to-use website with interactive maps, charts, and resources to help communities identify neighborhoods that may be more impacted by climate change. It shows where people may experience unequal impacts from flooding and extreme heat.

MyCoast NY collects and catalogs photos provided by volunteers that document changing water levels, shorelines, and hazardous weather impacts across New York’s varied coasts and water bodies. Photos are linked to real-time environmental conditions to create flooding and storm impact reports that help stakeholders like government agencies, business owners, and residents understand our changing environment and make informed decisions.

Submit your coastal flooding photos through this website/app. Photos are linked to real-time environmental conditions to create flooding reports that help stakeholders understand our changing environment and make informed decisions.

RAPT provides access to important data and analysis tools to support your community before, during and after a disaster.

This story map illustrates historical hurricane tracks, strike frequency, and potential areas of coastal flooding and inundation from storms.

Shows various SLR scenarios and flood event scenarios calibrated for the Long Island Sound CT coast. Also includes FEMA Limit of Moderate Wave Action boundary for referencing building codes.

Shows areas vulnerable to near-term flooding from different combinations of sea level rise, storm surge, tides, and tsunamis, or to permanent submersion by long-term sea level rise. Within the U.S., it incorporates the latest, high-resolution, high-accuracy lidar elevation data supplied by NOAA (exceptions: see Sources), displays points of interest, and contains layers displaying social vulnerability, population density, and property value.