I remember there were lots of bomb threats right after Sept. 11, 2001. It was a horrible time. That was my first month in the USA. It made me think this was not a safe country to live. 14 years later, I have to admit that I was wrong.
How can the baby chicks survive the winter? Do you just keep them under heating lamp all winter long? I'm afraid of fire hazard. I have a heating lamp and a Thermo-Peep Heated Pad, but don't feel safe to put either of them in coop. In the spring, I may try only use the Heated Pad (it stays 104F indoor) for the chicks first. It looks at least safer than the heating lamp.
If the chicks are being raised by a broody you don't need supplemental heat, if no broody hens then you would have to raise in a standard brooder set up with a heat source.