Extremely generous.
Morpheus, govenrments might not want to cause a panic, but they would want to go into a bunker to survive the blast. Maybe family, a few friends. They might not have anything to govern when they comeout, except their own survival in a bleak barren desert under the clouds of a nuclear winter.
If you evacuated all of Earth, where would you put all the people? 6 billion people to put into bunkers. You would have to do something like deep impact. You survive, you don't. But if it didn't hit then those who were picked to die, would not be pleased with their government. And extremely jealous with those who were picked to live. Not long before you get anarchy.
