We can express the FUTURE in the following five manners....
1.
Present simple (fixed, scheduled events)
2. Will/won't (predictions, with "I expect, I promise and I hope that the school will REOPEN!)
3. Present continuous (future arrangements) - I am visiting my gran this afternoon.
4. Form of to be + going to (future arrangement that might still change) - I am going to visit my gran this afternoon.
5. May/Might (less certain about the future) - The school may or may not reopen in two weeks.