OMAHA, Neb. (KMTV) — If you live in Douglas County, you should hear a siren around 11 this morning.
It's all part of a test of the monthly outdoor warning siren system. Today is the 45th anniversary of an event that showed people in Omaha why those sirens are so important.
On may 6, 1975, an F4 tornado ripped through much of the city, killing three and injuring more than 130. It also left more than two-thousand homes, businesses and even an elementary school damaged.
That damage was estimated at more than a billion dollars, making it still one of the ten costliest tornadoes in U.S. history.