If I were you, I would leave the area for the time being. Since there is no hurricane or super strong air current in the gulf area, it is unclear if the airborne toxins are being accumulated in this area.
There is a vast amount of methane bubbling from the gulf area. Contrary to what the media want us to believe, the majority of the methane gas will unlikely stay in the ocean water forever. It will very likely be released into the atmosphere within a short time frame. Methane will deplete oxygen in air.
The mercury from oil will evaporate too. As a neural toxin, mercury will sooner or later affect the newborn babies. Mercury could deteriorate the human's memory, confuse people, making them tired and depressed.