Homes in Barlby and Osgodby without gas supply
About 1,400 homes have been left without gas in North Yorkshire.
Northern Gas Networks said properties in Barlby and Osgodby, near Selby, were affected.
Food vouchers, heaters and hotplates were offered to residents, and an incident room set up at Osgodby Village Institute for information and advice.
Engineers said almost 900 of the properties without gas since Wednesday evening had been reconnected at the meter by 06:00 GMT.
Prioritising those who were vulnerable, the engineers had reconnected 450 properties by 21:30 on Thursday.
Hot showers are being made available for residents at Selby Leisure Centre.
Steve Pigott, of Northern Gas Networks, said: "We are working hard to restore gas supplies to customers as quickly and as safely as possible and are investigating the cause of the incident.
"In order to do this, we will need to be able to access every property to safely turn off the gas supply at the meter.
"While we're working to restore gas supplies, we're temporarily providing some residents with electric heating and cooking appliances to support them while they are without gas.
"The use of these appliances will increase demand on the local electricity network."