Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Storm Puts Oil Leak Crews on Guard in Gulf of Mexico Brian Wagner | Miami 22 July 2010 Vessels at the Deepwater Horizon oil spill site, off the Louisiana coast, 20 Jul 2010 Photo: AP Vessels at the Deepwater Horizon oil spill site, off the Louisiana coast, 20 Jul 2010 Oil crews were readying for a possible evacuation from the site of a damaged well because of a storm in the Caribbean Sea. Storm threatens to delay the final work of sealing off the well. U.S. weather forecasters upgraded the storm to a tropical depression early Thursday, as the system dumped heavy rain on the Bahamas. Experts with the National Hurricane Center in Miami said the depression had maximum sustained winds of 55 kilometers per hour and may strengthen more in coming days. Senior hurricane specialist Richard Pasch says wind shear may prevent the storm from developing into a hurricane. "We expect this to become a tropical storm, but not to strengthen that much more beyond that over the next few days as those unfavorable upper winds are expected to continue to affect it," said Richard Pasch. Forecasters say the storm is moving northwest on a track that will take it across southern Florida and near the site of oil crews in the Gulf. Officials in charge of sealing the damaged oil well have been watching the storm for days and have yet to decide on whether to halt work completely. Some skimmer boats began returning to port to escape strong wind and waves, which make it nearly impossible for crews to skim oil from the surface of the water. Drilling crews had been preparing to lay the final segment of pipe in a relief well that will be used to permanently seal off the damaged well. Late Wednesday, BP oil officials said crews halted drilling work to insert a temporary plug in the relief well. BP senior Vice President Kent Wells said the plug will enable crews to abandon the site safely if the storm approaches. "It is just another barrier, so, if we do have to leave, we have multiple barriers in the place of the well," said Kent Wells. "This is standard procedure, something we would do on any well." Wells said crews had hoped to finish drilling the relief well by late July. It is unclear how bad weather may affect the job of sealing off the well, which began leaking nearly three months ago when a drill rig exploded and sank. Eleven workers died in the accident. .