In your average fabrication or machine shop, there are what one might consider conventional hazards. They exist in many forms and are relatively common. Most workers are educated enough to understand what they are and how to protect themselves, but those hazards can change with the seasons, becoming more dangerous and likely to cause an injury.
Consider a grated steel walkway, for example. During the warmer months, the walkway may be slippery for a short while when moisture is present, but it’s generally safe to traverse. In the colder months — especially in areas that are exposed to the outdoors — the same walkway can become a death trap due to ice buildup, snow or even damp conditions.