My Jeep Grand Cherokee's belts all flew off

You know we can't see it over a computer. Someone is going to have to look at where the power steering fluid is leaking from to determine the likely cause. A return hose could have slid off or ruptured, and the fluid might have caused the belts to slide off a pulley. A belt that was ignored too long could have broken or shredded and whipped around and broke the power steering fluid reservoir.