On July 12, a fire in the Iron Mountain storage facility in Prologis Park, Bromley-by-Bow, in London, burned the building to the ground, destroying all of the records in the 126,000-square-foot structure, according to Melissa Mahoney, director of corporate communications for the Boston-based company.

An investigation is under way to determine not only the cause of the blaze, but why fire suppression systems didn't work, she said.

The London fire occured just one day after a blaze in the east end of Ottawa, Canada, caused damage to an Iron Mountain facility there, Mahoney said. While the investigation into that fire has also not been completed, it is believed to have been caused by some roofing contractors performing repairs.

The fire suppression systems in the Ottawa facility worked as designed, she said. About 3% of the data files were damaged, mostly by water, and less than half a percent have been damaged beyond remediation in the 65,000-square foot building, Mahoney said.

The London facility, which had fire-detection and sprinkler systems, stored primarily archival and inactive business records for London organizations, according to the company. Iron Mountain said that it expects all of the records in the London warehouse will be lost. Several prominent law firms stored files there, according to news accounts.