The CDC has a zombie preparedness blog. Just incase you need further proof that even those high up in government know this is coming….
A season of intense solar flares causes the poles to shift suddenly, the iceburgs to melt, and the seas to rise 13 feet overnight drowning most of the costal cities around the world within hours. The aliens who have been watching our societies develop use the resulting chaos to assert thier power giving scary conservatives of all flavors the political ammunition they need to rise up armies of undead in response. This is how we will survive: