Vulcan is able to fly and breath through space due to energy manipulation. Havok was able to beat Vulcan after he absorbed an entire star and blasted...
But if you look at the one scene, Wanda was totally covered in mud. Then in her next scene, Wanda was only half-covered. So obviously, Wanda shrugged...
If they did address it I would want it to be a setup for a bigger story. I’m still not a fan of the Morlock massacre being the sole thing that haunts...