Lahar warning drill Washington state.

If Mount Rainier were to erupt, it could trigger a lahar event, which emergency managers say would threaten the lives of thousands of people.

https://www.king5.com/mobile/article/news/local/disaster/pierce-county-schools-lahar-evacuation-drill/281-84196576-ea78-4f17-bad6-974fce9e8b7d