October : Storm surge stretches from Pascagoula , Mississippi , to Sabine , Texas . Louisiana governor declares state of emergency . New Orleans mayor warns residents to prepare for evacuation . Shell joins BP and Shell in evacuating offshore platforms .
NEW : Storm warning stretches from Pascagoula , Mississippi , to Sabine , Texas . Louisiana governor declares state of emergency . New Orleans mayor warns residents to prepare for flooding . Shell joins BP and ExxonMobil in evacuating offshore platforms .