High temperatures are necessary for the welding process. As such, you may need to protect yourself by wearing protective clothing.
Among the things you need are close-toed shoes, a long-sleeved but non-flammable shirts, and welding gloves. Also, a face shield and ear protection are essential to prevent sparks from getting into your nose, eyes, and ears.
As well, stay away from chlorinated hydrocarbon as you are welding to prevent poisoning.