Mountain Fuel Supply officials say natural gas supplies should remain adequate to keep homes and businesses warm this week despite record cold temperatures.

Officials estimated the company delivered nearly 685 million cubic feet of gas Monday, close to the record 707 million cubic feet sold on Jan. 19, 1984.MFS workers have been put on standby to ensure around-the-clock availability for house calls to keep furnaces and water heaters operating, officials said. Calls regarding loss of heat in residences will receive priority attention.

Officials said gas supplies are abundant and that Mountain Fuel's principal supplier, Questar Pipeline, has underground storage tanks capable of holding more than 10 billion cubic feet of gas in reserve to ensure continued service despite increased demand.