Wearing a hard hat or helmet is essential when there is a risk of head injury, but this equipment can also increase a person’s body temperature. We lose most of our body heat through our heads. Managers need to do everything they can to protect their workers in the field, keeping them as cool and comfortable as possible.

The internet is full of outdated, incomplete, and even wrongheaded advice, and the news is full of dire predictions that the world is getting hotter and heat illness is getting more frequent. So what’s a concerned safety manager to do?