Florida, North and South Carolina, Alaska, and Montana have been hit with snow, “dangerously cold” wind chills and freeze alerts.

Climate deniers are quick to say ‘I told you so’ when the mercury drops. But a warmer planet impacts weather in ways that can seem counterintuitive. Record cold temperatures are once again expected to hit a swath of the country this weekend—even plunging Florida into its coldest stretch of the last 15 years,