In this age of instant communication via cellphones and round-the-clock cable TV, when severe weather hits, the lives of many Americans are still partly dependent on the ear-splitting blasts from an old technology: tornado sirens. Six people were killed when a tornado rolled through Woodward, Okla., this month. Some of the towns tornado sirens failed after a lightning-caused power outage from storms earlier that day. But many lives were saved in other parts of the Plains in part by tornado sirens.
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