Coast Guard officials are considering setting the Gulf of Mexico oil slick on fire as it moved Tuesday to within 20 miles of sensitive ecological areas in the Mississippi River Delta.
Officials say it could become one of worst spills in U.S. history.
Oil is still leaking at a rate of about 42,000 gallons a day from the well, located some 50 miles off the coast of Louisiana beneath a drill rig that exploded and sank last week. Eleven workers are still missing following the incident, and are presumed dead.
BP, the well's owner, is racing to shut off the well using eight remote controlled submarines, but has had no luck as of yet.