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File - In this Jan. 20, 2010 file photo, waves pound a wall near buildings in Pacifica, Calif., during a rain storm. A new federal report gives the West Coast its best look yet at what to expect from rising sea levels due to climate change. The report issued by the National Research Council on Friday, June 22, 2012 says Southern and central California can expect sea levels to rise in a range of about three feel over the next century, while Northern California, Oregon and Washington can expect the range to be less _ around two feet. (AP Photo/Paul Sakuma, File)

Global warming

Global warming is leading to such severe storms, droughts and heat waves that nations should prepare for an unprecedented onslaught of deadly and costly weather disasters, an international panel of climate scientists said in a report issued earlier this year.