How do people rank tornadoes hurricanes?

Answer:
They rank them F5, F4, F3, F2, F1 and F0 on the Fujita sclae, which is based on damage. F5 causing total devastation, and F0 causing relatively mild damage.
First answer by Billy dawg. Last edit by Stormish. Contributor trust: 533 [recommend contributor recommended]. Question popularity: 2 [recommend question].