Monthly attribution overview May 2025 shows that human-induced climate change significantly intensified warmth across the United States and globally. Nearly all U.S. cities experienced above-normal temperatures, with large areas recording 2–5 °F anomalies. In the Southeast, heat was found to be at least twice as likely due to climate change. In Texas, over three-quarters of the population endured at least one day where extreme heat was three times more likely. Globally, the data show that more than 4 billion people experienced at least 30 additional days of extreme heat over the past year. All 67 significant heat events during that period were made more probable by climate change. The report emphasizes the expanding footprint of human influence on temperature extremes, not only in peak summer but throughout the calendar year. These insights support the growing need for localized heat adaptation strategies and underscore the role of attribution science in climate resilience planning and policymaking.