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It’s going to be a chilly Thanksgiving in the Northeast, with near-record cold temperatures in some cities. Which means, of course, that you can expect to get an earful from Uncle Walter over your turkey and stuffing about how global warming is just a hoax. He might bring up sunspots. Or something about Al Gore.

Many of us have an Uncle Walter, to borrow the character from the Ben Folds Five song, in some form. People can be cantankerous and counterfactual at any age.

But how to respond?

Well, first of all, it is undeniably going to be colder than usual for this time of year. On Twitter, Zeke Hausfather, a climate researcher at the University of California, Berkeley, delivered a forecast of frigid temperatures and a high probability of climate denial: