As Kentucky's governor warns of a high death toll from Friday's storms, rescue efforts are underway and families are waiting in agony for news of loved ones
Daniel Rothman says carbon in the atmosphere may push our seas past a tipping point, triggering a cascading catastrophe for global ecosystems that we do not yet fully understand
High temperatures, strong easterly winds in potentially dangerous combination previously seen in 2010 and 2016; climatologist: 'Global warming is causing an increase in extremes'
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