Not sure if it's a cat in heat, i hear that sound at least 3 0r 4 times a week. Cats meet on the rooftops out here, and a few of them picked my roof terrace as a meeting place. They fight, play, or whatever it is they do, but when they do it, they make that awful noise, like a crying baby as you said.
I wish they did that somewhere else, i hate that sound.
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