Sirens go off in Duncanville, but it's no cause for alarm, city says

Duncanville, TX - Emergency sirens went off unprompted Sunday night in Duncanville.  There was no emergency, however, and Duncanville officials were working to resolve the issue, city spokeswoman Cody Ann Bainter said.

The sirens started about 8:30 p.m. and continued sounding an hour later, according to posts on social media.  

No other information, including what caused the sirens to go off, was available Sunday night. 

The sirens could apparently be heard in nearby Cedar Hill. 

The city's outdoor warning system is made of eight sirens, according to the Duncanville website. The sirens are meant to alert residents to situations such as severe weather, but there were no threats on the radar Sunday night. 

Along with other cities across Dallas-Fort Worth, Duncanville officials test the emergency sirens at noon on the first Wednesday of every month.  

In April 2017, Dallas residents experienced a similar problem when all of the city's 156 emergency sirens went off for more than an hour. Computer hacking was later blamed.

Source: Dallas Morning News