In spite of (or perhaps because of) the constant repairs after a major storm every 10 to 15 years, Houston actually has one of the lowest energy costs in the United States: https://www.bls.gov/regions/midwest/data/averageenergyprices...

For some real numbers for Houston specifically in the middle of the hot summer months, input 77002 (a Houston metro zip code) into Texas govt's electricity provider search engine https://powertochoose.org/ ; it will show most plans are around 12-14 cents per kwh, down to 10.9 c/kwh on a variable 12 month 500kWh plan.