Brent Taylor with the Houston Fire Department said crews responded to an investigative high-rise incident at about 12:19 p.m. Tuesday.
When first responders arrived, they saw a scaffolding from a construction site in the concrete near Main Street and Rusk, updating the report to a rescue call.
Investigators said concrete fell on top of the scaffolding, possibly from the eighth floor, and landed on an elevator box.
The construction supervisor told HFD that people were potentially trapped due to the collapse.
Taylor said crews searched all 10 floors of the building. They found a construction worker stuck in the elevator, and everyone else was able to escape.
The man was taken to the hospital in stable condition.
Permits filed with the City of Houston show that the project is an expansion of the neighboring JW Marriott.
The METRORail service has been temporarily disrupted during the investigation. There is no timeline for when the investigation and clean-up will conclude.
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