Utilities shut off
Gas
Shut off the gas only if:
you smell gas odor or hear a blowing sound from any pipes or appliances, or
you notice a broken or disconnected pipe, or
the meter spinning quickly can also be a leak indicator, or
your house has slid off its foundation (after a natural disaster).
If you notice or suspect a gas leak:
open a window,
evacuate everyone immediately (upwind location),
do not use matches, lighter, any open flame appliances or tool, electrical switches (they can cause sparks),
turn off the gas using a wrench to turn the valve one-quarter so that it is perpendicular to the pipe,
when you are in a safe location, call your gas company,
don't turn back on the gas yourself, call a qualified professional to do it.
Electricity
Shut off electricity in case of:
an electrical fire (appliance, wires, motors), or
flooding, or
broken or frayed electrical cords.
When shutting off the power:
first shut off individual breakers/fuses,
then shut off the main breaker/fuse.
When turning back on the power:
first turn on the main switch/breaker,
then turn on the individual breakers/fuses.
DO NOT enter a flooded area to shut off the electricity.
Water
In case of a major disaster (earthquake, tsunami, mud slide) the water supply network might be damaged and the water polluted.
Shut off the water if:
you notice a leak, or
you experience low water pressure.
Label the water valve with a tag. If this valve can’t be completely shut off (because of rust for example), replace it.