The sirens sounded around 2:20 a.m. and didn't go silent until sometime after 3. But unlike Saturday morning, there was no severe weather in the area.
"The Emergency Outdoor Warning Sirens have malfunctioned and are automatically sounding. We are currently working to address the concern, and will provide follow-up as quickly as possible," read a post on the city of Lancaster's Nextdoor page. "Sorry about the inconvenience."
At 4:11 a.m., the city of DeSoto issued a tweet that read, "Hopefully, by now they are all quiet."
The city also alerted residents via its CodeRed notification system saying everything was all clear and there was no emergency.
An earlier tweet from DeSoto read, "Please disregard the Emergency Sirens that you hear going off in some parts of the Best Southwest Cities around 2:30AM Tuesday. This is the result of a malfunction and NOT an Emergency. We are working to correct the problem. Apologies for the inconvenience."
DeSoto police received several calls from residents about the sirens.
"This was the result of a malfunction in the system and is currently being investigated as to the cause," the department said on Twitter.
Even some residents in Dallas were awakened by the noise.
"We are receiving reports that sirens have been activated. THERE IS NO EMERGENCY," the Dallas Office of Emergency Management tweeted. "Our outdoor warning system has not been activated."
All of Dallas' 156 sirens were activated late one night in April 2017 after someone hacked into the city's emergency system.
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