⚡ What Is an Arc Flash? An arc flash is a sudden release of electrical energy through the air when a high-voltage gap exists and there’s a breakdown between conductors. In simple terms — it’s an explosive burst of heat, light, and pressure that can cause severe injuries in a split second. Temperatures can reach up to 35,000°F (hotter than the surface of the sun 🌞), melting metal, damaging equipment, and creating shockwaves strong enough to knock workers off their feet. That’s why arc flash PPE