So here is my now well thought out approach if you live in this area. If you already suspect gas is in your house then just get out(open door very gently). If not then shut off the main gas valve(to kill some ignition sources). Shut off the main electric breaker(to kill more ignition sources) and open all the windows. And then get out. There is almost no chance of an explosion if you do that.
I hope nobody lights a candle in these areas. Night is falling and they’ve shut off electricity.
Shut off the main electric breaker
Unlatching a breaker especially a main is an ignition source in itself, don’t do this.
“If you already suspect gas is in your house then just get out(open door very gently).”
Yes! Do not turn on/off any lights, do not use a phone, just get out.
“If not then shut off the main gas valve(to kill some ignition sources).”
No! Only a properly trained and certified person (gas company employee, fire department, or plumber) should operate the gas service stopcock. If it’s an old plug style stopcock, it doesn’t have an internal stop that stops movement in full open or full closed position. So if the valve is not fully closed you’ll have blow-by.
“Shut off the main electric breaker(to kill more ignition sources)”
NO! By doing this you can create a spark.
“and open all the windows.”
NO! By doing this, if there is gas blowing outside the structure, you now make it easy for gas to enter the structure.
The explosive range of natural gas is 4% to 15% gas in air. Opening windows and doors with gas already inside the structure you can cause the gas to reach this range and cause an explosion. Let the gas company or fire department vent the gas from the structure.
Best advice is just leave. Don’t turn on/off lights, don’t make phone calls, etc. Just get the hell out and move upwind from the gas leak.