- Rapid breathing.
- Increased heart rate.
- Clumsiness and dizziness.
- Decreased vision, especially in low lights.
- Euphoria.
- Decreased alertness.
- Loss of memory.
- Weakness.
Is a methane gas leak dangerous?
Methane is nontoxic on its own but can become lethal when it combines with another gas. Methane causes asphyxiation by displacing oxygen. … Because of the lack of oxygen, the result is usually death.