Lighthouse (APH Apocalypse Fanfic)

No one saw it coming. No one wanted it either. But as soon as the word got out, everyone was in panic. Some brave, some not. Many people has this scenario as their worst nightmare, but for many again, the worst was yet to come.
Basch (Switzerland) and his sister Erika (Liechtenstein) had much yet to come. As the rulers of their own separate countries, this is the first time they've been separated since Erika was born. As they each try to protect their countries from the horrible event at the horizon, they can only think of each other. This is a problem, until that fateful day.
One day, Basch receives a strange message under another rulers name, mentioning a Lighthouse on the coast of the United States. The letter says that the Lighthouse strangely has not received the effects of this catastrophe, and that when arriving there, it will be safe to wait out the apocalypse. Can Basch contact his sister in time? Can Basch trust his sister anymore? And most importantly... will they make it to the Lighthouse in time?