So you think it's cold now? Just imagine icebergs floating down the river through the middle of King's Lynn.
Prolonged cold snaps early in 1979 and 1981 saw ice floes form upstream of the town.
Reg Hare, Lynn's long-serving ferryman, had to carefully pick his way through them as they came down on the outgoing tide.
The tidal Ouse doesn't freeze because of its constantly-changing water levels.
But the river upstream of Denver Sluice can ice over, along with its main tributaries the Wissey, Little Ouse and Lark.
Reporting on the ice in 1979, the EDP of the time noted that it was the first time floes had been sighted on the river in Lynn since the winter of 1962 - 63.
The phenmomenon is unlikely to occur again this year, as temperatures are expected to start creeping back above freezing again by the end of the week.
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