Category Nuances for building_collapse:

• technical,
• cataclysmic,
• traumatic,
• dangerous,
• urban,
• major,
• tragic,
• disastrous,
• critical,
• extreme,
• catastrophic,
• structural,
• possible,
• threatening,
• immediate,

Simple Categories for building_collapse:

• occurrence,
• incident,
• event,
• situation,
• failure,
• danger,