Fire swept through part of the News 4 San Antonio building Tuesday morning. Fire alarms went off shortly before 5:00 a.m. About 10 minutes later, everyone inside the building was asked to evacuate. As they walked out of the building, News 4’s crew turned around and found that the second floor of the northwest corner of the building was engulfed in flames. Within minutes, heat from the fire blew out the windows, and a second alarm was sounded. Dozens of firefighters were called to battle the fire and had it under control about an hour.