Short answer: no! Long answer: https://en.wikipedia.org/wiki/List_of_European_tornadoes_and_tornado_outbreaks
It turns out (according to this Wikipedia page) that the first recorded European tornado was in Ireland! That was in 1054 and there's been one since.
I'm no expert, but I think that (outside of the digital world of Duolingo) one could translate "chabhraíteá roimh an tornádó" as "you would help before the tornado." Certainly, with the context indication the past, in my dialect of American English, this would be understood as a past habitual/imperfect. But... on Duolingo I wouldn't dare translate the past habitual with "would!" I'd be afraid that the computer scoring would struggle to distinguish the past habitual "would" from the conditional "would." So here I'm sticking to "used to."