Resources for

Storm surge

11
June 2026

SRC Training

USGS Compound Flood Hazard Assessment Mapper Webinar

This virtual webinar featured the U.S. Geological Survey’s (USGS) new Compound Flood Hazard Assessment Mapper. Municipal staff, state agencies, and other partners joined to learn how USGS developed this new tool and how they could utilize it in planning and decision-making.

 

This webinar was hosted by New York Sea Grant, Connecticut Sea Grant, and the U.S. Geological Survey, with funding from Long Island Sound Partnership.

For questions or more information, email Kathleen Fallon.

A recording of the webinar along with webinar slides and a Q&A and references document is available below.

New York State
Connecticut State
Flooding
Sea Level Rise
Stormwater Management
Infrastructure
Planning
Extreme Weather & Storms
Green logo that reads USGS: science for a changing world Logo for Long Island Sound Partnership. New York Sea Grant logo Connecticut Sea Grant logo
11
June 2026

SRC Events

Compound Flood Hazard Assessment Mapper Webinar

Join us to learn about the U.S. Geological Survey’s (USGS) new Compound Flood Hazard Assessment Mapper. During this virtual webinar, geared towards municipal staff, state agencies, and other partners, you will learn how USGS developed this new tool and how to utilize it in planning and decision-making. 

This webinar is hosted by New York Sea Grant, Connecticut Sea Grant, and the U.S. Geological Survey, with funding from Long Island Sound Partnership.

For questions or more information, email Kathleen Fallon.

New York State
Connecticut State
Flooding
Sea Level Rise
Stormwater Management
Infrastructure
Planning
Extreme Weather & Storms

Mapper

Level of Effort:

USGS Compound Flood Hazard Web Map

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.

New York State
Connecticut State
Flooding
Sea Level Rise
Stormwater Management
Infrastructure
Planning
Extreme Weather & Storms

Mapper

Level of Effort:

NYC Flood Hazard Mapper

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.

New York State
Flooding
Land Use
Sea Level Rise
Stormwater Management
Planning
Extreme Weather & Storms