many countries have very bad weather. people worry about heavy rain,typhoons,and hurricanes. in many parts of the united states,people have to worry about another thing : tornadoes
tornadoes are extreme weather events. like hurricanes and typhoons,it is the high winds that cause damage. tornadoes usually occur in the spring and early summer. sometimes,they appear when the weather is calm, but usually they occur on windy days
many parts of the united states have tornadoes
tornadoes usually occur when the weather is calm
when a tornado is coming, people should go in their car