From the National Association of Letter Carriers:
Don’t put yourself in danger: On Jan. 3, the Postal Service issued mandatory safety talks to be given to all employees regarding protection from cold temperatures. Click here to find the documents that management was to provide you through these stand up talks. If management has not provided these safety talks, advise your supervisor, shop steward, branch officers or, if necessary, your national business agent. Bottom line: Do not put yourself in danger.