In Britain, an underground room is a cellar.
Underground rooms are commonly referred to as basements or cellars. These spaces are typically used for storage, recreational activities, or shelter in case of emergencies.
It depends on the strength of the tornado, but it is not as safe as a fully underground basement. In most cases it would be safe, especially if you can get into a room that is in the underground portion of it.
If its an underground reservoir for water, it could possibly be an Aquifer.
Underground water is called underground water, because it is "underground" not because it is fresh or salt. You can have underground salt water reservoirs just like you can have fresh water ones.
Underground erosion can form caves, sinkholes, and underground rivers. Deposition can result in formations such as stalactites, stalagmites, and flowstone.
In Britain, an underground room is a cellar.
The name given to the room beneath a house is called a basement.
underground , it is part of the underground railroad
Cellar Basement
its a subterranean chamber ; a subterranean chamber is a underground room used to confuse robbers
Cellar
A subterranean chamber is a room or open space that is underground.
It was in his ship which is now gone, you had to get the key which was in his office.
Carlsbad Caverns.
All of the secret rooms are... EPF Command Room, Secret Ninja Hideout, Iceberg, Underground Pool, Boiler Room, PSA Head Quarters from older years, Underground Mine, The Hidden Lake, and the Command Room.
Carlsbad caverns
underground pool