People are understandably focused on all the water brought by these atmospheric rivers over the past few weeks. But it is starting to worry me that they don't bring only water, but also heat. Not just some abstract heat predictable from the specific heat capacity of humid versus dry air, but so much heat that you can feel it. Of course we need to deal with flooded houses, washed-out roads, downed trees, drowned fields. But it feels to me that there's a long-term problem much bigger in the heat than in the water, and when the water is all that we talk about, the heat still comes regardless.