HOUSTON (CBSDFW.COM/AP) – A company that operates a pipeline that moves nearly 40 percent of the South’s gasoline estimates that it will resume carrying fuel through Texas by Sunday.

Steve Baker, a spokesman for Colonial Pipeline, said Thursday that the pipeline is underwater in parts of Texas dealing with flooding from Harvey and that those sections would have to be inspected before it could resume operating. But he says the pipeline is still operating from Louisiana to the eastern states, though deliveries will be “intermittent.”

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Reopening the shuttered Texas sections of pipeline could help avoid major gas shortages, but huge challenges remain, as several giant Texas refineries were shut down due to the storm.

All of these problems have sent gasoline prices surging. The national average for a gallon of regular gasoline has risen from about $2.35 a week ago to $2.45 now.

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QuikTrip will begin limiting gas sales at its North Texas stores before the end of the week. Company spokesman Mike Thornbrugh said that they are now working to identify which stores will not sell any gas.

Several drivers have already reported stations out of gas, and others are waiting in long lines for their chance to fill up.

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(© Copyright 2017 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)