Gimdrus understand that even if people underneath are still alive they can't help identify their location to allow focus their effort.
Next thing the Gimdrus will do - talk to workers/citizens to understand if any work organization could improve the chances i.e.:
1. When did the thing collapsed and how?
2. Anyone aware of the exact location of workers trapped under the rubble - this could help to focus the rescue effort
3. What was this structure before and are those who built it around suggest how to faster rescue people? i.e. dig beneath
OOC:
Based on the fact that Lucinda were unaware of the issue it should have collapsed just a moment ago. Why isn't she organizing more citizens to help with the rescue? Is she?