High winds force water through broken windows. Ironically, a fire can lead to more damage caused by the firefighters' hoses than smoke and flames. A firefighter's job is to douse a blaze. You can't expect the character with the hose to avoid soaking your servers and terminals when a fire endangers human life or threatens to destroy an entire office. Nor can you expect a sprinkler system to discriminate between in-force policy files and scrap paper.
Water damage is almost inevitable during and after an office fire.
PMPs include regular inspections of office plumbing and wiring, windows, skylights, doors, and roofing. Standard wear and tear to such fixtures can create tiny openings for water to enter. Occasionally repairs or replacement of fixtures are necessary, but the cost of a new seal for window frame is much less expensive than clean-up and restoration after a flood. Office workers should be encouraged to report any pooling of water, especially in washrooms, cafeterias, and parking lots. Any suspected water damage on walls and ceilings should be carefully noted.