Governments advise citizens to prepare for an emergency UK: 3 days Japan: 3 days and they are not alone: Belgium: 72 hours Ireland: "Be prepared for emergencies" France: 72 hours Germany: 3-10 days Netherlands: 72 hours Poland: 3 days Sweden: 1 week Norway: 1 week Finland: 72 hours Denmark: 3 days Estonia: 1 week Latvia: 72 hours Lithuania: 72 hours Switzerland: 1 week Taiwan: 7 days EU: 72 hours 17 countries + EU.