Work's been underway to make gas supplies safe after a collision involving two vehicles and a house.
Emergency crews, including Police and Fire Service were called to Thistle Grove in Welwyn Garden City last night.
One of the vehicles had ended up hitting the porch of a property.
A structural engineer was also called due to concerns about the building's safety.
The Bedfordshire Cambridgeshire and Hertfordshire Road Policing Unit Tweeted, "Our friends from @HertsFRSControl have done a sterling job in making the scene safe due to gas pipe compromised..."