HOUSTON --The weather may have played a role in a transformer fire that forced the evacuation of a southwest Houston office building earlier today. An eyewitness shot the video above on a cell phone. Office workers say they first heard a loud boom and then the power went out. Everyone was cleared out of the building as firefighters responded to the fire. "Went over and looked and saw flames shooting out of the building, so I climbed up the stairs -- the elevators were already out -- to tell my doctor's office the building was on fire," said Barbara Trellue. No one was injured in the incident.