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CORSICANA (CBSDFW.COM/AP) — Cleanup crews are dumping gravel to firm up an area near two overturned locomotives that derailed during North Texas flooding.

A Union Pacific spokesman said Tuesday that crews are working to rebuild track washed away during storms north of Corsicana.

Two crewmembers swam to safety after much of the 64-car train derailed early Saturday during storms that left behind about 20 inches of rain.

Spokesman Jeff DeGraff says track repairs began Sunday afternoon with crews hauling in gravel, by truck or rail car, as far down as the track would allow. DeGraff says tracks were damaged or washed away on several spots along a 15-mile stretch.

The freight cars, bound from Midlothian to Houston, were hauling loose gravel when the train derailed about 50 miles south of Dallas.

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