HOUSTON — Members of a cleaning crew had to evacuate Two Houston Center by going down 40 flights of stairs, after a four-alarm fire broke out on the 16th floor Tuesday night, according to KPRC-TV.No one was injured; the 16th floor sustained heavy fire, water and smoke damage, the 14th and 15th floors sustained water damage, and 17th floor had smoke damage; all four floors were closed Wednesday, the story noted.A cleaner told KPRC: "It's real scary. Real tiring because it's a 44-floor building. We got to get from 40 down the stairs and it's tiring." .