The Storage Box was hit especially hard. The entire ground floor is mostly underwater after a torrent of runoff came gushing down the slope, reaching as high as nine feet at one point.
"I've got 67 years worth of paperwork down there," unit renter Ron Simchen says. "That was my history, and it's gone."
Simchen's treasures are submerged beneath 6 feet of murky water.
"About 150,000 books down there, Disney Memorabilia, Native American dolls," Simchen says. "How do you replace that stuff?"
City of Tacoma crews are trying to find a place to pump all the water, hoping to clear a big storm drain on the property that could funnel all extra muck safely downhill.
"We don't normally see something like this happening," says Mike Blake. "It was just a multitude of things that piled up at the same time."
Some intersections flooded badly as the downpour overwhelmed the city's drainage system. One worker says water pressure blew a 450 pound manhole cover twenty feet in the air.
"I've never seen it come down that hard," Blake says. "I really haven't."
Once utility crews pump out the ground floor of The Storage Box, Simchen and nearly sixty other customers will get a chance to inspect their saturated belongings.
"I've just got to deal with the idea that I've probably lost everything," Simchen says.
Owners of The Storage Box say they've owned the building for 20 years, and have never seen it flood before.