I am told that the UK has the highest number of tornadoes per square mile than every other country. Is that true?
Not quite. It's the highest number of
reported tornadoes per square mile. We're so densely populated I think tornadoes here have a higher chance of being noticed and reported.
Also, we're a small country. I wouldn't be surprised if took an area the size of the UK and plonked it over the right part of the US, you got a higher rate, but the US rate drops when you average it over the entire country.
In fact, now that I look into it, I'm not sure it's true at all. The FAQ on the TORRO site says 33 reported tornadoes a year. That's about the same as Vermont, and I hadn't thought Vermont was a big state.
Which isn't to say tornadoes aren't a threat here. They're one of the few real natural threats we do have. We don't have much in the way of volcanoes, earthquakes or hurricanes.