And that is a small one....
150 feet across will take out more than a city. Think about all of the volcanic ash for the last 25 years being tossed into the atmosphere within a millisecond. That would take the edge of global warming for a few months.
Get used to eating canned food. Nothing will grow for about year. A sunny day at the beach would be a memory for a few years.
Starving will take folks minds off Brittany though. So we got that going for us.