Harris Texas - 58.73% White
Also look at the stick that goes South. That’s the majority-black Third Ward, with the majority-white neighborhoods to the West and the white/Hispanic neighborhoods to the East not in the district. Note though that they didn’t cut out all of the South East, since the finger that sticks down from the I-10 goes into the black Clinton Park neighborhood.
If not gerrymandered to give blacks an advantage, the 18th would probably be majority white, then Hispanic, then black. Blacks are less than a quarter of the city’s population.