By Pat Loeb

PHILADELPHIA (CBS) — At least three dozen people were killed when fire erupted at a dilapidated warehouse in Oakland, California on Friday night.

The Ghost Ship, as it was known, had a history of violations and complaints. No official cause of the fire has yet been determined, but illegal residences, an illegal party, and inadequate exits appear to have contributed.

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Philadelphia also has many vacant warehouses being put to unconventional use. So could it happen here?

Mayor Jim Kenney says the Department of Licenses and Inspections is always working to track down illegally converted buildings and underground clubs — and the Oakland fire is a reminder that the holidays are the prime season for parties in misused, and possibly unsafe, spaces.

“They are talking today with our inspectors to make sure that we reinforce the importance of making sure that these things are looked at and are safe,” the mayor said.

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The mayor says the public can help by rejecting invitations to firetraps and reporting potentially dangerous activity.

“It’s important that people stay vigilant in their neighborhoods,” Kenney said, “and if you see this kind of ad hoc nightclub thing set up, to let us know as soon as possible.”

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To report a potential hazard, call 3-1-1.