The East River flows beneath snow Thursday, March 14, 2024, in Gothic, Colo. Billy Barr’s measurements revealed something he never expected long ago: snow is arriving later and disappearing earlier as the world warms. That’s a concerning sign for millions of people in the drought-stricken Southwest who rely on mountain snowpack to slowly melt throughout spring and summer to provide a steady stream of water for cities, agriculture and ecosystems. (AP Photo/Brittany Peterson)