More than just news
I live in Dallas and it was crazy, starting about 11:45 p.m.. I don't think it was done to each siren location, it was reported it was the main warning system where they can set them all off from one location. After it had been going on about 30 min., I heard on one radio station it was a system malfunction, then there was nothing about it on that station and nothing on other stations or TV. There were several thousand calls to 911 which could have been avoided if they had aired the problem. Needless to say, it was difficult to sleep until they finally got them shut down about 1:30 a.m.
I can imagine it was very scary for some .. not knowing what was happening. Thank goodness they found the problem and shut them off.