Intense heat is covering much of the U.S., and it is forcing a cool down in terms of train speeds.
DART trains are not going above 30 mph on the rails, creating delays as long as 15 minutes. When rail becomes too hot it increases in length and can develop bowing. According to DART, temperatures on the rail are reaching 150 degrees. Catenary lines also are sagging due to the heat.
More than 100 million people in the U.S. are under excessive heat warnings, and more than 80% of the population will experience temperatures in the 90s over the next few days.
DART will continue to monitor the weather in north Texas.