The mild conditions have a regular result: snow melts during the day, freezes at night and is then covered with a fine layer of snow by morning - making completely lethal surfaces. And - equally dangerously - snow melting from roofs forms icicles which freeze, then melt again and crash to the ground.
One of my colleagues got hit by a falling icicle over the holidays, which broke her nose (this, she said mournfully happened immediately after her dog swallowed a toy and nearly died.) Still, she continued, at least it didn't fall on her head. Which is why random barriers appear on the street, and people tend to walk on the outside edges of pavements.