It was not yet clear what caused the corner of the building to crumble. City officials and prosecutors in the Bronx said they were investigating the collapse.
Government officials and energy developers misjudged the difficulty of building huge clean energy projects in the United States, which has built very few of them.
The evacuation of a tower block in Bristol, after surveys found structural concerns, drew fresh attention to the construction of Britain’s public housing high-rises and possible safety issues.