As economic chatter in the last several weeks reacts to the effects of the recent downgrade by the credit-rating agency Moody’s on US creditworthiness, we began to wonder whether sovereign creditworthiness may also be affected by rising temperatures. Might credit downgrades, in this case triggered by the self-inflicted injury of erratic tariff decisions that create higher inflation and lower growth, also be triggered by a reckless policy of climate denialism?