Live in Table View, Cape Town. Very windy and hot.
I Have a Yucca in a Pot Outside, the Leaves Are Going Brown at the Top. Why
Certified GKH Gardening Expert
This is a sign that the plant is under some kind of water stress. Typically for yuccas, this would mean too much water but given your location, it may be too little water. Check the roots just to make sure there is not root rot (which would prevent the plant from taking up water) and if the ground is very dry, give it some supplemental water.