Tick, tick tick BOOM!
Keep in mind that a good underground bomb shelter is supposed to protect you even after a bomb explodes. It should protect you from nuclear fission and radiation, whose effects can still be felt even after several years. Your shelter should also be accessible from different parts of your place. People will be staying in the shelter for some time so make sure to provide good ventilation, ample storage areas, and comfortable living conditions. You can go as far as including an air filtering system that removes radiation from the air.
Rabbits burrow into the ground.
underground squirrels, plus they make a whistling noise.
Yes
underground squirrels, plus they make a whistling noise.
underground squirrels, plus they make a whistling noise.
An underground shelter is a good idea for tornadoes, but not for hurricanes. One of the main dangers during a hurricane is flooding, which would make underground the last place you want to be.
The cv shaft
Yes they did work. The shelter had just the amount needed to make safe if inside. If a bomb were to hit the shelter it would miss. The likely hood of your shelter getting hit was impossible at that time.
underground squirrels, plus they make a whistling noise.
How did Timuca make shelter?
It is not a realistic goal to have an animal shelter in your basement, because animals make noise, your neighbours would complain, also you need a permit to have that many animals in your house. Your house would probably start to stink.