Tornado sirens cannot be the only source of warning if severe weather is on the way. The city council has learned from a city manager report that it should double the number of sirens in Kansas City. It also faces a $600,000 fixit project for 33 dead sirens. However, tornadoes normally strike during humid weather when many homes are closed up, and air conditioners are running. The city manager suggests thorough public education to help in that arena.