A fire that caused more than $1.3 million in damage at a Waipahu warehouse was intentionally set, according to HFD investigators. The fire happened Sunday just before one o'clock in the afternoon at "west Oahu Roofing." The two-story warehouse was engulfed in flames when firefighters arrived on the scene. The business was closed at the time and no one was inside. HFD said that the building had no working smoke alarms or fire sprinklers. The case has now been handed over to police. So far, no arrests have been made.