I got two, 4 minutes apart. The first could have caused an accident if I'd been driving as it startled me so much, I really don't think it needs to be so screeching and loud. When we were in Canada a few years ago we got several warnings of an approaching tornado. None were accompanied by this loud screech, not even the one that said "get to a place of safety NOW"
I'm pleased the alerts can go out, and I wouldn't want to block them, but unless it's an immediate life and death situation I think a less startling sound would be preferable.