The extreme weather battering Europe, the UK and the East Coast of the United States is being traced back to something known as the polar vortex.
When it's strong it keeps the cold air in the Arctic, but when it's weak, like right now, the cold air escapes.
That means temperatures in some parts of the North Pole have been 30degC higher than usual and the escaping cold air has wreaked havoc in countries further south.
ITV's Dan Rivers went to Svalbard in Norway to investigate what's going on.
Watch the video for the full report.