Our seed-potato store at Kapurthala holds its chambers at +2 to +4 C from November to March, with high humidity. That is not a freezer, but a whole shift in damp cold wears people down.
Loaders work inside a chamber for no more than 60 minutes at a stretch, then take a 10-minute break in the warm room by the office, with tea from the urn. The shift lead keeps the break board.
The quilted jacket, gloves and woollen cap from the store issue, over your own warm clothes. Wet gloves are changed for dry ones at every rewarming break.
Shivering that will not stop, clumsy hands, slurred words or confusion can be the start of hypothermia, even at +2 C, especially in older workers and anyone who has skipped a meal. A person showing those signs leaves the chamber with a colleague and is seen by the first aider.
Nobody works alone in a chamber. The chamber door's inside release is tested at the start of every shift by the shift lead.
The canteen serves a hot meal at the middle of each shift in the season. Eat it. Drinking water and tea are free all day; cold and damp make people forget they are thirsty.