Fire is - potentially - everywhere...
Our company producing paper is controlled by SCADA systems from electical energy supply (utility and own generators), through wood processing machines (chippers) and whole production line to waste and water treatment plants. With very little effort (in software) you can destroy whole mill: exceed some parameters (pressure or something else), let it explode and rip some equipment carrying strong chemicals (for example HCl = hydrochloric acid). That carried by wind and/or water will kill local population...
In case of emergency ALL personel including contractors have gas masks. Mine is in the drawer below computer here. It is only to escape. Many windsocks around indicate direction to chose. In the town people don't have all of that. They don't have to have computers to be afected. OS is also irrelevant...
