I just got a large batch of water leak sensors and was setting an automation to send a notification to my phone and I was worried that I would miss the notification. I found this page in the documentation for doing critical alerts. On iOS the notification stays persistent, even after unlocking the device. What’s really nice is that if you have an Apple Watch, the notification will also show up there and play a sound if the watch is on silent mode.

Even though I hope I never get one of these notifications, I’m really glad that this functionality exists within Home Assistant.

Just thought that was really neat.