Texas grid is about a quarter powered by Wind. Since Wind and Solar are dynamic - there may be variations and how they are measured, but to claim Texas Electric Portfolio is 85% fossil is not right numbers.
Coal is almost dead and there is minimal oil for electric generation. Hawaii burns oil more than Texas.
I think there are 2 nuclear power plants .. one is Comanche Peak which is south west of DFW, not sure of the other.
edit: https://www.eia.gov/state/?sid=TX#tabs-4
(click the electricity tab)