<p><br /> Key vessels and drilling will evacuated the site of BP's blown-out oil well in the Gulf of Mexico due to Tropical Storm Bonnie.<br /> </p><p><br /> Bad weather means the site will be abandoned for about 48 hours, the top US oil spill official said.<br /> </p><p><br /> "If we have to evacuate the scene we're probably looking at a very limited window -- probably 48 hours," retired US Coast Guard Admiral Thad Allen told reporters.<br /> </p><p><br /> The storm is projected to swirl across the Gulf near the site where crews are working to plug the spill.<br /> </p><p><br /> BP is currently conducting pressure tests to determine the stability of the capped well, but those tests would be halted by an evacuation.<br /> </p>
