Ah, yes. California. Where large swathes of costal areas hover between 60ºF and 80ºF. We are talking about Nevada the weather of locality matters and where it can be supremely hot.

You posted the Texas grid, I posted the California grid. Here's the NW grid which includes Nevada. Same thing, demand peaks around 6PM when people get home and turn on their houses.

https://www.eia.gov/electricity/gridmonitor/expanded-view/el...