tornado alley
It matters what game you are playing. For example i play Wizard101 and so far the hardest boss to me is Jabberwock.
Tornadoes are not given names as hurricanes are. The most damaging tornado recorded so far was the Topeka, Kansas tornado of 1966.
The most recent tornado in the world is the outbreak (so far) is in the USA in most of May.
Tornado sirens or alarms are designed so that they can be heard at least five miles away. Tornado sirens are placed in cities and towns and rural areas so that people can be warned well in advance of a tornado.
Albany
No, diamond's are the hardest substance known to man so far.
Albany, North Shore
Tornadoes will happen with or without climate change. So far there is no conclusive evidence of a link between tornado activity and climate change.
This is largely subjective. In terms of physical and financial barriers the hardest thing is probably rebuilding after a tornado or dealing with injuries. From an emotional standpoint the hardest thing is probably recovering, identifying, and burying the dead.
The greatest number of tornadoes recorded so far from a single hurricane is 117.
Boxing, by far.