With the Russian invasion of Ukraine, nuclear war is still very unlikely, but I'd guess it's the most likely it's been in my lifetime. It's worth thinking through how this impacts any disaster plans you might have:
What would you do if you got an incoming ICBM alert? Are there supplies you would wish you had that are worth sorting out now?
If you live in a major city or near a likely military target, is there a level of escalation at which you would want to leave for somewhere less populous? Is there planning for that which would make sense to do now?
If war elsewhere causes serious supply chain disruptions, is there anything you depend on (ex: medication) that it's worth trying to get extra of now?