A mantle plume producing almost as much heat as Yellowstone supervolcano appears to be melting part of West Antarctica from beneath. Researchers at NASA have discovered a huge upwelling of hot rock under Marie Byrd Land, which lies between the Ross Ice Shelf and the Ross Sea, is creating vast lakes and rivers under the ice sheet.

July 3 at 3:47 PM All-time heat records are at risk in Alaska in coming days as a massive and abnormally intense area of high pressure locks in and strengthens over the region. This heat dome is expected to produce temperatures near and above the highest values ever recorded for multiple days, particularly in southern parts of the state.