i have 3 lovely yucca trees in my back garden each about 7 foot which were thriving nicely and looking well. the past 2 winters or so have been rather harsh but the yucca has pulled through until this winter. in november the temperature dropped quickly bringing hard frosts and heavy snow fall which lasted up until end of december. jan and feb have been wind and rain with a few dry days. now my yucca tree looks awful and poorly as all its leaves have decided to drop of leaving a bare trunk and also the trunk is passing what looks like water but also in parts of the trunk there is a creamy pink substance leaking out and it smells bad. i don't want to loose my yuccas but i don't no if i can save it or has the winter took hold and killed my beloved trees.
Assuming they were in the ground and not container grown I'd keep hope alive. They are amazingly resilient plants. Best though you remove all soft/dead/rotted material so rot doesn't spread to living tissue. Even if that means cutting them to the soil line. Don't be surprised if they don't make their appearance above ground until well into late Spring or early Summer. Dust the freshly made cuts with garden sulfur.