Missouri gas prices are expected to rise 25 cents a gallon by this time next week.
Officials from AAA have said that Hurricane Issac, which is currently ripping across the Gulf of Mexico, will shut down offshore oil rigs.
The National Hurricane Center predicted that the tropical storm would become a hurricane on Tuesday with 74 to 95 mph winds. It is expected to hit from an area southwest of New Orleans to the edge of Florida's panhandle.
The cheapest unleaded gas available in Maryland Heights as of Monday afternoon is $3.64 per gallon, at Petro Mart and . That means gas could reach as high as $3.89 by Sept. 3.
Tropical Storm Isaac targeted a broad swath of the Gulf Coast on Monday, bearing down just ahead of the seventh anniversary of Hurricane Katrina.
The potential for a landfall as a Category 1 hurricane as soon as Tuesday prompted evacuations along a wide area of the Gulf Coast and sent people out to stock up on staples.