Just out of curiosity, I went over to nuclearsecrecy.com/nukemap. It’s a webpage where you can enter a location and yield for a nuclear detonation and see how far the approximate effects would go. I entered in a 40 MT airburst over Paris.
Yes, one bomb that big would definitely ‘do’ Paris, and the thermal radiation pulse at detonation would cause 3rd degree burns for about 40 miles in all directions. It wouldn’t destroy France, but it sure would decimate a good-sized chunk around Paris.
Well, at least they don’t know our response time ...