It was just after 3 p.m. when William Li received the unusual call from his wife, who was at work, saying she'd heard from a friend that their building was on fire.
There were no alarms, no signs of smoke in his 2nd floor apartment, and no burning smell to give a sense of urgency, so the 40-year-old office worker who was home on a day off decided to change from his pajamas before heading outside.
