Crews are nearing the halfway point in making track repairs to the Kansas City Streetcar rail that buckled in the heat on the Fourth of July, but it will be another week or two before service is resumed, a streetcar spokeswoman said. “Once we get through this weekend, we’ll have a really good idea on when we will be able to reopen service,” said Donna Mandelbaum with the Kansas City Streetcar Authority on Wednesday. The KC Streetcar had to abruptly suspend service after a rail on the Main Street Bridge over Interstate 670 unexpectedly failed on Independence Day. The repairs were estimated to take as long as three weeks, partly because time was needed for the new concrete that is being poured to cure. Then, streetcars will need to be taken out to test the system before passengers can ride again along the 2.2 mile route that runs from Union Station through downtown to the City Market. And the failure should serve as a warning about the possible impact climate change could have on inf...