I don't know what you guys have down there, but up here the natural gas grid is fairly independent of the electrical grid. Seems that when you have natural gas right there in the pipe, it's considerably cheaper and more efficient to run a good ol' GE turboprop off natural gas to drive your pumps/turbines, and these generate plenty of auxiliary juice to run the electrics and control systems in your facilities, so why rely on coal-fired stuff that's two hundred miles away and three times the price per kW? Bottom line, I've lost electrical power for many long hours, but I've never heard of a gas pressure drop. YMMV.