Climate and health

Climate, including extreme weather, has a direct impact on health. As NYC’s climate changes, along with the world’s climate, we expect more frequent and intense heat waves, increased rainfall and more severe storms. These will add to existing weather-related risks. Already, heat kills more people than all other natural disasters combined.

In New York City, those most vulnerable to the dangers of hot weather are older adults and people with health conditions like heart disease, diabetes, and cognitive impairment - especially those in low-income, Black, and Brown communities. Air conditioning is the best defense against the heat. Equitable access and responsible use of air conditioning is crucial to protect the lives of all New Yorkers while reducing impacts on the environment.

Data Features:

Interactive Heat Vulnerability Index

Map of neighborhood heat vulnerability, and the neighborhood characteristics that affect it.

Your heat story

Read about New Yorkers' experiences with heat in the context of climate and health data.

Real-time heat-related illness

Data tracking heat-related emergency department visits during hot weather.

Flood Vulnerability Index

Neighborhoods at most risk to flooding.


2025 NYC Heat-Related Mortality Report

Annual analysis of heat related deaths, contributing factors, and neighborhood impacts.

Data Stories:

In January 2025, the Metropolitan Transportation Authority Bridge and Tunnels (MTABT) started charging a toll for …


Whether it’s electricity powering air conditioning in the summer, gas or oil heating in the winter, or the other …


New York City’s public transit system has gotten New Yorkers where they need to go and home again for over a …


Cold weather can be dangerous. Here are some tips for staying safe this winter.


Imagine your child has asthma. One summer night, a powerful storm rolls in and knocks the power out. Your child …


Neighborhood Reports: