Indicators

Each indicator below tracks one measurable signal of a changing climate in the United States, built from public data with the code and sources published alongside it.

Note🚧 Coming soon

This site is under construction. Content is being added indicator by indicator — check back soon.


 
A Closer Look: Heat-Related Workplace Deaths
Health
Temperature

Deaths of U.S. workers attributed to heat exposure on the job.
 
Cold-Related Deaths
Health
Temperature

Deaths in the United States attributed to extreme cold.
 
Drought
Weather and Climate
Drought

This indicator measures drought conditions of U.S. lands.
 
Global Greenhouse Gas Emissions
Atmosphere
Emissions

This indicator describes emissions of greenhouse gases worldwide.
 
Growing Degree Days
Health
Temperature
Ecosystems

How the number of growing degree days has changed at 280 long-term weather stations across the contiguous 48 states since 1948, and what that suggests about pollen seasons.
 
Heat Waves
Health
Temperature

How the frequency, duration, season length, and intensity of heat waves have changed in 50 large U.S. cities since 1961, and how the U.S. Annual Heat Wave Index has varied…
 
Heat-Related Deaths
Health
Temperature

Deaths in the United States attributed to extreme heat.
 
Heat-Related Illnesses
Health
Temperature

Hospitalizations in the United States attributed to extreme heat.
 
Heating and Cooling Degree Days
Society
Temperature

Trends in the energy demand implied by outdoor temperatures, nationally and by state.
 
Heavy Precipitation
Weather and Climate
Precipitation

This indicator tracks how the frequency and intensity of heavy precipitation events have changed across the United States.
 
High and Low Temperatures
Weather
Temperature

Trends in unusually hot and cold temperatures across the United States.
 
Length of Growing Season
Society
Temperature
Ecosystems

How the frost-free season in the contiguous 48 states has lengthened since 1895, nationally, by region, and by state.
 
Lyme Disease
Health
Disease

This indicator tracks the rate of reported Lyme disease cases across the United States.
 
Ragweed Pollen Season
Health
Temperature
Ecosystems

This indicator presents data on changes in the length of ragweed pollen season in the United States and Canada.
 
Residential Energy Use
Society
Energy

How much electricity and natural gas U.S. homes use for summer cooling and winter heating, alongside cooling and heating degree days.
 
River Flooding
Weather and Climate
Flooding

How the magnitude and frequency of river flooding have changed at stream gauge stations across the United States since 1965.
 
Seasonal Temperature
Weather and Climate
Temperature

Trends in average seasonal air temperature across the contiguous United States since 1896, and how the change varies by season and by state.
 
Streamflow
Weather and Climate
Streamflow

How the amount and timing of streamflow in rivers and streams across the United States have changed since 1940.
 
Tropical Cyclone Activity
Weather and Climate
Storms

Frequency and intensity of hurricanes and other tropical storms in the North Atlantic.
 
U.S. and Global Temperature
Weather and Climate
Temperature

How average air temperature has changed across the contiguous United States and worldwide since 1901, and how those changes vary by climate division.
 
West Nile Virus
Health
Disease

This indicator tracks the rate of reported West Nile neuroinvasive disease cases across the United States.
 
Wildfires
Environment
Wildfires

This indicator tracks the frequency, extent, and severity of wildfires in the United States.
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