Yes, it's good to hear that our friends are safe.
We had a lot of tornadoes in this area recently. They have just updated the warning system here, putting in more and louder sirens. We have never been able to hear them very well in our house, or even outside for that matter, when it's storming.
They also keep changing the criteria for when they set off the sirens, so that nobody knows what they mean any more and have become desensitized because the sirens sounded so often. From now on, it's supposed to be the real thing when they sound- like take cover, a tornado has been sighted nearby.
Karen