According to the U.S. Environmental Protection Agency's report to Congress, "the retreating Iraqi army set fire to or damaged over 700 oil wells, storage tanks, refineries, and facilities in Kuwait."[9] Estimates placed the number of oil well fires from 605 to 732. A further thirty-four wells had been destroyed by heavy coalition bombing in January.[8] The Kuwait Petroleum Company's estimate as of September, 1991 indicated that there had been 610 fires, out of a total of 749 facilities damaged or on fire. These fires constituted approximately 50% of the total number of oil well fires in the history of the petroleum industry,[9] and damaged or destroyed approximately 85% of the wells in every major Kuwaiti oil field.[8]