Here’s a house that was turned to kindling by a gas explosion: http://www.nzpdg.org.nz/news/details/cause-revealed-of-gas-e... https://www.stuff.co.nz/national/114388788/gas-contractor-wh... “[the gas fitter] had not isolated the gas supply to the fire he was part-way through repairing, and he failed to tell the residents not to turn the main gas supply back on”. Of course you would want to analyse the relative risks of gas versus electricity.