Governments tell citizens to stock up on emergency supplies UK: 3 days Japan: 3 days Belgium: 72 hours Ireland: "Be prepared for an emergency" France: 72 hours Germany: 3 to 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.