<human>:  What are the differences between a hurricane and a tornado?
<bot>: The primary difference between a hurricane and a tornado is their size and intensity. Hurricanes are much larger and more intense than tornadoes because they are sustained by heat from the ocean's surface and that energy is more powerful than the energy created by a tornado. Hurricanes usually have sustained winds of more than 74 mph, while tornadoes typically range from 40 mph to 100 mph. Tornadoes are also much smaller than hurricanes - only a few miles wide at most. Additionally, hurricanes move more slowly than tornadoes, usually taking several days to move a few hundred miles. The path of a hurricane is also more difficult to predict than the path of a tornado.