Had to stay up all night because of fire in nieghbor's apartment, now I need to go to school soon?

I woke up after three hours of sleep last night at 7 am and need to stay awake until 6 when I get home. It is 5:15 now. How do I stay up? I'm in summer school and can only miss one day to pass the course and I already am planning to have an absence next week for when my dad will be in town for a day.