WISE - working in a stressful environment - is entirely different to SFS - suffering from stress. Different symptoms, different alternatives, and, crucially, different responsibilities.
WISE is a management responsibility and should be a priority of responsible and caring school leaders. The good news is that there are a range of management tools and techniques which are suitable and available. The bad news is that these are notable in many schools by their absence.
First, a tool which gives us a vocabulary to discuss the causes of WISE, and a basis for understanding those causes. This is explained here.