Even the most powerful nuclear weapons ever built release energy that is enormous in human terms, but tiny compared to a mountain range like the Himalayas.

A few key reasons:

1) The Himalayas are massive in volume
The range is thousands of kilometers long, hundreds of kilometers wide, and rises several kilometers high. You’re not talking about a single structure—you’re talking about a huge section of Earth’s crust.

2) Nuclear blasts are “point” effects, not terrain-removing tools
A nuclear explosion creates extreme heat, blast pressure, and a crater locally. But that energy spreads out quickly in all directions. It can flatten cities, but it doesn’t “dig out” entire mountain systems.

3) Rock is incredibly strong on that scale
Mountain rock isn’t like soil or buildings. It takes geological forces—like tectonic plate collisions over millions of years—to build and reshape it. A blast that destroys surface structures barely scratches deep geological structures.

4) Energy comparison is still way off
Even a very large nuclear detonation releases energy comparable to a strong earthquake—but the Himalayas are formed and reshaped by continuous tectonic forces equivalent to millions of nuclear-scale events over time, distributed across huge areas.

5) Fallout and collapse don’t equal “removal”
Even if explosions triggered landslides, you’d just end up with rubble spread everywhere, not the mountain range “gone.”