Bruce Beach is not playing around and may know something we don't know.  Brice Beach started building his Nuclear Shelter in 1980 and is quoted by a News Source as saying.

“My anticipation is that about 80-85 percent of the world’s population will be destroyed.”

Mr. Beach has built his Nuclear Shelter, which is designed to accommodate 500 people, using 42 school buses linked together and covered with a couple of feet of concrete and several feet of earth, according to News Reports.

Bruce Beach's Nuclear Shelter:

Luke Moretti, News 4 Reporter / WIVB News

Bruce Beach's Nuclear Bunkroom:

Luke Moretti, News 4 Reporter / WIVB News