I can vouch that the feral cats in my neighorhood vocalize loudly and persistently during mating seasons. But it seems to happen only in the dead of night.
At one time a feral Siamese lived in the storm drain...quite strange to drive slowly and spot blues staring from the curb drains.
Yes, I’ve heard female cats howling in heat - a very creepy sound.
But the creepiest was when I startled a red fox as I walked by an area of brush; even in daylight it’s chilling, and loud out of all proportion to their size when you’re right next to it:
https://www.popville.com/2016/05/screaming-fox-dc/