This map shows that record high temperatures are fast outpacing record low temperatures. Not only does that portend declining snowpacks%2C drier and hotter summers and wildfires%2C but it also means more winter melting of snow that accumulates and likely more outbreaks of pine beetles formerly beaten back by cold winters. Graphic courtesy climatecommunication.org%2C based on NOAA data and analysis from Gerald Meehl at the National Center for Atmospheric Research