Storm surges up to 4ft are possible along parts of the Louisiana and Mississippi coasts, officials say.
Wells' body was found in the water near Mississippi's Horn Island days after he went on a boating trip there with friends.
Chevron is now importing 250,000 barrels of crude per day from Venezuela.
Almost half of US states have declared emergencies as officials warn of "life threatening conditions" that could affect 180 million people.
A masked figure is caught on surveillance video inside pouring liquid before the blaze.
Officials investigated after hearing complaints from real drug traffickers about having to pay bribes to officers.
Twelve others were injured in the incident, which happened at around midnight.
Clarksdale, Mississippi, is where some of the biggest legends in Blues music got their start.
Dozens of tornadoes also cause extensive property damage and leave tens of thousands without power.
