I agree, for me running would probably mean that area where I live have become uninhabitable. About the only reason I can think of, would be a radioactive fallout following some sort of nuclear incident.

Luckily, most of this forum's readers live in free countries, so information is available to them. During the Chernobyl nuclear accident, people in the affected areas were not even told about the incident for 36 hours following the explosion at the reactor. This of course lead to many unnecessary dead and sickened people. (Then again, perhaps a widespread panic was prevented?)