Cars, private documents, and streets have turned to ice from the massive amounts of water firefighters have pumped into the Williamsberg warehouse as they continue to monitor the smoldering fire in Brooklyn. Though now under control, officials are concerned about potential privacy breeches as these sensitive documents, some of which contain detailed personal information such as social security numbers and medical histories, have been scattered along the shore and streets in the worsening weather.

According to The New York Times, New York City has sent workers to try to recover the potentially sensitive documents. Trying to keep curious onlookers at bay, they have been wading through freezing water with nets and shovels with limited success. Observers were seen photographing documents, paging through them and keeping some.

The warehouse held records from the state court system, the city’s Administration for Children’s Services, the Greater New York Hospital Association, and the Health and Hospital’s Corporation. So many papers were released from the burning warehouse that one of the fire boat’s water-intake systems was clogged.

In the windy waterfront, half-burnt documents blew through the air and passersby eagerly collected handfuls next to the shore despite the smoke. One man picked up a scrap documenting a urine sample. “Patient given specimen cup,” it read.

Though not as severe as the blizzard in Chicago, freezing weather in Brooklyn has caused water pumped into the building to freeze, covering cars and leaving documents completely submerged in the ice near the building.

The cause of the Williamsberg fire in Brooklyn is still unknown. Firefighters had been called to the building at 4:30 a.m. on Saturday for a smaller fire and discovered it had been contained by the building’s sprinkler system. They shut down the water to prevent further damage to the documents, only to be called back to the building an hour later as it blazed out of control. Fire marshals are not sure if the fire was deliberately set or if it was accidentally sparked, perhaps by faulty wiring.