Climate Impacts

Climate impacts cover the tangible effects of a changing climate on American life: hotter average temperatures, rising seas, shifting rainfall patterns, and more frequent extreme weather events like floods, heat waves, wildfires, and severe storms. These effects touch infrastructure, agriculture, public health, insurance markets, and local economies, which is why federal, state, and local governments track and respond to them.

Measuring change. Government scientists at agencies across the federal system collect long-term data on temperature, sea level, ice cover, and storm activity to determine how quickly conditions are shifting and where the changes are most pronounced. This monitoring work forms the evidence base for public policy decisions, and understanding how government data shows climate change is accelerating helps explain why agencies keep expanding what they measure and how often they update it.

Costs and consequences. Extreme weather and long-term climate shifts carry direct financial costs, from disaster recovery spending to strain on public insurance and infrastructure programs. Federal, state, and local budgets absorb these costs in different ways, and the scale of that burden is a recurring point of debate among policymakers, insurers, and taxpayers.

Looking ahead. Forecasting how climate patterns will continue to shift helps governments plan infrastructure, emergency response, and land use decisions well before disasters strike. These projections are inherently uncertain, and disagreement persists over how much weight to give them in current policy.