With a tornado bearing down on the small Missouri town of Sparta, the lone warning siren stayed silent because a downed tree kept the mayor from getting downtown to flip the switch that activates it.

Most tornado sirens are activated remotely by computer, but not Sparta’s. The old siren is hand-operated from a tiny building that once housed City Hall. Only the mayor is authorized to set it off.

So when Mayor Jenni Davis got a cellphone alert just after 1 a.m. Monday that a twister was heading straight for Sparta, she was about to jump in her car. It was no use. A large tree blocked the street near her home.

“There was absolutely nothing I could do,” Davis said. “I felt horrible.”

The EF1 tornado damaged several local homes and downed trees and power lines. Davis saw the twister’s power firsthand when her husband had to strain to pull her sister inside, out of the raging wind.

Overall, though, Sparta was lucky. No one was hurt. But Davis knows something has to change.

Davis, 34, was elected mayor in April and is a lifelong resident of Sparta, a town of 1,900 residents about 35 miles (56 kilometers) northeast of Branson. She recalled that when she was a girl, a firetruck would drive around town sounding its siren when a tornado threatened.

The hand-operated warning siren, which sits atop a telephone pole in the center of town, was added about two decades ago. To activate it, the mayor flips a switch that winds up the siren, making an ascending “whirr” sound, then flips the switch again to make the descending “whirr.” The process is simply repeated continuously until the threat goes away.

Davis isn’t thrilled with the prospect of driving through a dangerous storm to the shed-like building housing the siren.

“I have to get into my car and drive,” Davis said. “When everyone is trying to take shelter, I’m running into town.”

It’s an odd system for sure. Dennis Mileti, former director of the Natural Hazards Center in Boulder, Colo., said he’s never heard of one like Sparta’s.

Terry Cassil, operations chief for the Missouri State Emergency Management Agency, said newer siren systems are typically activated through software, either through the 911 center or from the emergency manager or sheriff’s office. Most older system are activated through signals sent from two-way radios or pagers.

Cassil said there’s a general misconception about storm warning sirens, which are meant to alert people who are outdoors to get inside and seek shelter.

“The sirens are not designed to warn people inside their homes,” Cassil said. “They are called outdoor warning devices for a reason.”

In fact, some communities have turned away from outdoor sirens. Kalamazoo, Mich., this year stopped using its sirens, citing the cost of upkeep and the difficulty in replacing worn out parts. Longmont, Colo., stopped using its siren system in 2017, citing the repair costs and questions about their effectiveness.

Today, a variety of apps generate warnings on cellphones. Local TV stations saturate coverage when a severe storm approaches using increasingly accurate radar technology.

But Mileti said sirens still serve a purpose because no single warning system is fail-proof.

“You need to communicate warnings and alerts over every channel available to you,” he said.

Davis would like Sparta to get a new siren, but it would cost up to $50,000, which the cash-strapped town doesn’t have.

Help may be on the way. News reports about the ancient siren prompted a call to Davis from aides of Republican U.S. Rep. Billy Long, offering to seek grant money.

Financial help or not, Davis said it is time to retire the old siren.

“We’re going to shut this one down and figure it out,” she said.