I wouldn't say that's true for gas. Without the right maintenance and/or shutdown procedures, refinery systems can reach dangerous pressures and literally explode.
Even shutting down a refinery is a very calculated process. If the refinery teams decided to walk away doing nothing, people would be in danger. The sheer amount of toxins released could kill quite a few, let alone explosions or fire.
I'm not a big fan of gas power, but it's surely deadly in the wrong hands.