Horn alert sounds keep playing on my iPhone

Mr. Bill3 sent a suggestion which I checked but there were no other alerts or ringtones using the 'horn' sound. The emergency alerts were the only ones. This morning, one of the first things I tried was a reboot but that didn't work -- eventually I turned off all the emergency alerts but that didn't stop the random horn soundings. Later I did a second reboot and that seems to have silenced the horn (3+ hours now and counting).

Here, perhaps, is a clue as to why the horn sound kept playing...I received an iCloud mail that seemed to want me to use the Find My app -- here is that mail.

Since nothing was missing from my stable of Apple devices, I didn't open that app. It's hard to imagine that it was some sort of phishing expedition. Eventually, I'll re-enable the emergency alerts that I turned off.

Thanks for that suggestion -- see my subsequent post after a 2nd reboot seemed to have stopped the random horn sounds.