This is a dangerous and wrong assumption. Weather events can have high area. What do you do if a hurricane comes at the same time as high cloud cover?
You don’t. If your plant is properly designed, you’re absolutely immune to any extreme weather conditions.
Heck, we have nuclear-powered vehicles sent beyond our galaxy and they’re still working.
Nuclear power is literally the only form of energy we have that can work under virtually all environmental conditions.
Nuclear fission works even in vacuum.
The problem with nuclear is we can't have it until we have eliminated corruption. In that industry it can lead to a literal nuclear meltdown.
and even then just "restarting" it, is not as easy as restarting software.