Excellent points. I think the specific scenarios really help with preparation. Starting with likelihood also helps you focus. My most likely scenarios are short-term utilities outages – so preps include disruptions to water supply, electricity, heating issues during cold times, etc. As you can see, these preps help with general preparedness for less likely but more impactful scenarios. P
Chlorine is heavier than air, meaning it falls down to the ground and can’t travel far. Closing the windows for people in residential areas should be good enough vs the costly and risky evacuation. Even if you have a go-bag, evacuation is a major overkill unless it literally happens next door.