[scan59]

When a shelter-in-place is issued, nearby residents should:

Go inside
Shut all doors and windows
Turn off air conditioners and heaters to prevent outside air from getting inside
Turn on the radio to listen for instructions
Stay off the phone

I've always wondered why they tell us to turn off the air conditioner. Don't ACs simply re-circulate the inside air throughout the house? They don't draw air in from the outside.

Side note: Does anybody know any reason why your hot water heater should not be used as an emergency supply of drinking water?

[abishai]

Because drinking from the hot water heater would cause series burns on your mouth and throat?

[uglybiker]

If your water is already hot, what do you need a heater for?

(Thank you, George Carlin.)