NEW BRAUNFELS (CBSDFW.COM/AP) – The Texas heat wave has affected some rail service as high temperatures threaten to warp tracks.

The Denton County Transportation Authority has enacted a heat-speed restriction this week, with a slowdown in train speeds from 60 mph to 45 mph for the passenger line between Denton to Carrollton.

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DCTA vice president Tom LeBeau says the slowdown is for safety reasons because of the extreme heat.

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Dallas Area Rapid Transit says Trinity Railway Express trains, between 2 and 9 p.m., will also operate at reduced speeds this week. DART said on Wednesday that they staying in contact with the Energy Reliability Council of Texas (ERCOT) in the event of possible rolling blackouts. Such outages would impact traffic lights and DART’s signal system, which would then alter rail schedules and bus routes.

Union Pacific Railroad on Tuesday afternoon notified New Braunfels police that a train was blocking a crossing due to heat-related problems with a section of rail. Traffic was rerouted as the line was checked. FM 306 reopened Tuesday night.

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