In case of signs of leakage
- Turn off the gas
 - Ventilate thoroughly by opening windows and doors
 - Stop the use of open flames and electrical appliances
 
In the event of a serious leak and fire
- Try closing the valves
 - Ensure that all persons are kept at a safe distance from the scene of the fire
 - Call the fire service's emergency number 110
 - Do not attempt to extinguish the fire yourself