Don, it's CLEARLY urban heat island effect. That's why the 10 warmest years at Death Valley (pop: 0) are 2022, 2021, 2025, 2018, 2017, 2024, 2020, 2014, 2012, and 2016. Note the handful of older years are all missing months, mostly in the cold part of the year. It's actually pretty wild that recent years are as warm as those years that have no data for one or more winter months.