CLEAN : Several injured in S.Africa hospital roof collapse

The transcript describes a rescue operation following an incident where sniffer dogs were used to search for trapped individuals. The rescue team worked to manage rubble, ensuring no one was left unassisted. The process involved removing concrete stones, which inadvertently led to a structural collapse due to the weight placed on the roof.

Describe the method used by the rescue team to remove concrete stones.

What was the consequence of the weight of the concrete stones on the roof?