Rafael upgraded to hurricane; could undergo 'rapid intensification.' Is US at risk? USA TODAYRafael Now A Hurricane As It Heads Toward Gulf The Weather ChannelHurricane Rafael is expected to rapidly intensify as it barrels toward Cuba WKBN.comFlorida hurricane forecast: With Rafael rumblings, storm-stung state should only see rain Tallahassee DemocratOil and gas producers cut US Gulf of Mexico output ahead of storm Reuters