It is ridiculous to criticise the timing of the announcement because it comes at the start of the school year.
All public buildings should be safe to work in and have evacuation plans in place and working, clearly marked, emergency exits. Any that don't, should immediately be closed.
It is hardly fair to blame the present government exclusively either.
They, previous governments, municipal authorities, school boards, and teachers have seemingly know or suspected for years that their buildings and evacuation plans were not up to standard - so a lot of different people are sharing the guilt here, or should be.
You might as well blame individual heads of schools for not peremtorily closing down their schools on safety grounds years ago, or getting workmen in to repair things, as blame any government.
Yes, finding suitable alterative accomodation will be hard and expensive - but surely some rich business men and women could be asked to help if schools have to foot the bills themselves.
It is in everyone's interest that children are well-taught in safe surroundings.