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Rio Grande Valley stores are reporting brisk sales but dwindlings supplies of cold weather equipment and gear.

Piping insulation is flying off the shelves as the region braces for an arctic blast that is expected to arrive late Thursday.

Managers with Johnny's True Value in Harlingen told Action 4 News that piping insulation is almost gone at Valley hardware stores.

Portable space heaters, firewood and plant-wrapping materials are also popular items that are quickly disappearing off store shelves.