Awesome stuff but I don't like the nuclear
Add one more, virus this one starts gradually with just one individual infected but you will only be informed about it when 25% of your population in the city is infected you could choose to close your city border (this will cost money and resources and you will not generate any revenue from the closed city and contamination rates in the city will increase) in other for it not to spread round your entire nation any nation that performs trade with you during the period from when the first person contacts it till when you have contained it will get the virus then if you perform any bank operation or any bank funds are sent to you then
Either
the virus enters the bank and any one who performs a bank transactions (within a period of time) would contact the virus
Or
Every nation with bank permission will contact it
This would be cool as it gives way for epidemics
then this could bring in a while new aspect of the game like the way projects work there could be emergency rescue schemes e.g Red Cross could reduce population casualties by 25-50% medical research centre will give you a 25% chance of finding a cure for the virus/plague. Evacuation team will help slowly evacuate citizens from affected areas to other cities (this could work like spy missions where there are three types slow and steady 5% chance of it spreading, just normal 15% chance, extremely quick 20% chance) firefighters could give a 35% chance of stopping a forest fire
There would be a disaster tab the way there is a project tab
It would show you your disaster stats, history and your rescue schemes
then also other nations won't be able to see the disasters you are suffering
I'm not done yet so I will edit later