sentences:  After flashing over in the ballroom (which witnesses confused with an explosion), the hot gases swept up the grand staircase into the lobby of the hotel.From there, the fire was drawn through the open doors of the casino by the smoke-eaters (devices in the ceiling that sucked the smoke from cigarettes out of the room) present throughout the casino.With more than 150 guests estimated to be in the casino when the fire started, most of the deaths occurred in that area.