Where there's smoke, there's fire?

The Woodlands Fire Department responded to a commercial fire alarm at 10200 Grogan's Mill Road and The Woodlands Parkway today, after smoke was seen coming from a ceiling vent on the fourth floor. When it's coming from a ceiling vent you can't dismiss it as burnt popcorn in a microwave. The first fire truck arrived within two minutes of the alarm going off...the time it tooked to walk down four flights of stairs. (I might add that I wasn't moving slow.) They have a better two-minute drill than Drew Brees. A second, third, and fourth truck arrived within a minute of each other. This was comforting because we had just purchased new computers for the office.
A thorough search of the building and the use of heat-seeking devices by the fire department, ruled out any fires or hot spots. No burnt popcorn either.
Although four trucks were dispatched, Captain Merrick of the Grogan's Mill station said this was standard procedure for commercial fire alarms. Protocol prevented him from discussing the details, but the situation was deemed insignificant and building occupants were allowed to return to their offices. There may not have been a "hot spot" in the building, but it was cold outside. We were glad it turned out to be a non-issue so we could get back inside.
We always appreciate the prompt service from The Woodlands Fire Department, and they probably appreciated that it wasn't burnt popcorn in the microwave again.