Cautionary Note: Rita + Oil = chaos?

Got this message from a friend who immediately suggested I fill up on gas. Looking for data on refinery locations to map it myself and not sure how much I trust without data on such percentages....

BP is shutting down all refineries and pipelines near the Texas coast, and several other petroleum companies including Shell and Mobil are preparing to shutdown tonight. If a Category 5 hurricane hits Houston something like 30%+ of this counties [country's sic] refining capability will be destroyed in a matter of hours (not damaged, destroyed).