We had a Cl2 spill at a siding near our house awhile back. It was an ungodly mess, and even a little bit of the stuff will hurt you.
Fortunately we were upwind and the gas tended to settle towards the river where there wasn't much residential property.
Stay indoors til you get the all clear.
Thanks. Yes, I'm staying indoors.
3 fatalities and 3 in critical condition. Untold number of others in serious condition. Media reports at the hospital they can still smell chlorine outside.