Climate Mechanisms & Evidence
Understanding how the climate system works and why it's changing
Extreme Heat Basics & Health Impacts
Summer 2025 is a warning. 255 million Americans exposed to dangerous heat (June 2025) and 21,000+ heat deaths (U.S., 1999-2023)
Warming Trends & Temperature Records
January 2025 breaks the record. Record-breaking temperatures becoming routine. All 10 warmest years on record occurred 2014-2023
