The workplace of a caster is a very hot environment. With the fire ovens and molten metals, the environment can be extremely uncomfortable for those who cannot handle heat well. The caster must wear protective clothing and sometimes head gear. This can make the environment even hotter.
A metal caster works with very dangerous materials. The molten metal alone can cause serious burns, but the caster also works with all sorts of machinery and tools that can be dangerous. Cutters such as knives and grinders can cause serious injuries if they are not operated properly.
The chemicals in the air of most casting environments can cause breathing difficulties for some. Most factories have air purification systems in place, but while the caster is heating and pouring the metal, they can be exposed to airborne chemicals.