Global sea levels rose about six inches from 1880 to 2009 , says science fiction . Melanie Brown , The Spanger - Siegfried : It 's accelerating along East Coast . Annapolis , Maryland , and Washington , D.C. , for example , can expect to average more than 150 tidal floods a year , and several New Jersey locations could suffer 80 tidal floods or more annually . By 2045 , nine locations can have tidal floods 240 times or more per year , they write .
Global sea levels rose about six inches from 1880 to 2009 , says science fiction . Melanie Brown , The Spanger - Siegfried : It 's accelerating along East Coast . By 2045 , nine locations can have tidal floods 240 times or more per year , they write .