The phrase "prone areas" refers to places or regions that are likely to experience a particular event or problem more often than other places. Full definition
Where the bible stories took place was in one of the most earthquake prone areas in the world. (religion.blogs.cnn.com)
The national flood insurance program was created in the 1960s to deter people from building in flood prone areas. (vox.com)
Critics of the project have raised additional concerns, including the fact that the line would cover flood - prone areas of the city, as well as its efficiency compared with buses. (amny.com)