Earth Observatory - Science - Earth Observatory - A Hot Start to Spring in the… - Earth - Earth Observatory - Image of the Day - EO Explorer Topics - All Topics - Atmosphere - Land - Heat & Radiation - Life on Earth - Human Dimensions - Natural Events - Oceans - Remote Sensing Technology - Snow & Ice - Water More Content - Collections - Global Maps - World of Change - Articles - Notes from the Field Blog - Earth Matters Blog - Blue Marble: Next Generation - EO Kids - Mission: Biomes About - About Us - Subscribe - 🛜 RSS - Contact Us - Search Extreme heat lingers over the U.S. Southwest and Mexico on March 20, 2026, in this visualization based on GEOS-FP data. NASA Earth Observatory/Michala Garrison In March 2026, the first official day of the Northern Hemisphere’s spring felt more like summer across much of the southwestern United States. Numerous high-temperature records fell that day amid a bout of extreme heat.…