A weld in the gas main stretching from Trinidad to Aguilar failed on Tuesday, cutting service to both communities in southern Colorado.
The leak has been stopped, but residents won't have service until at least Thursday.
The outage affects about 3,600 Walsenburg Utilities customers and 270 customers in Aguilar.
Walsenburg City Administrator Dave Johnston tells KRDO-TV that utility workers will have to assist customers light their pilot lights, which could take several days.
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