I'm actually in the middle of working on a resource for that exact thing: https://ae.studio/same-day-skunkworks/risk-of-nuclear-disast...

we're collecting better sources, but eventually you should be able to visualize a heatmap if you will of locations at higher risk.

We're working to add variables like wind travel direction, known military bases, etc. - super speculative, but I think it's better than what currently exists.