noun
vertical evacuation
Evacuating to a higher floor or rooftop within a building, typically during a tsunami or flood, instead of moving horizontally to distant high ground.
津波警報が出たら、海岸近くのビルでは垂直避難が有効な場合がある。
When a tsunami warning is issued, vertical evacuation in a building near the coast can be effective.
この地域では、洪水時に垂直避難できるよう、高層階への避難経路が整備されている。
In this area, evacuation routes to upper floors have been prepared so that vertical evacuation is possible during floods.