STILL AT IT: D2 Publicity’s West Coast office has relocated to a temporary space in Los Angeles after a fire Tuesday destroyed its new Beverly Hills location. An investigation is underway to determine what caused the blaze. A faulty furnace may have been the source, according to a company spokeswoman. D2’s staff had only moved into the La Peer Drive address the day before. But the staff was back at work Tuesday morning, working remotely from their laptops until they moved into the temporary space. The company’s New York office remained open throughout the turmoil, the spokeswoman said.