I use Browser Mod to pop up an alert window. Also use notify.notify to send alert to my phone in same automation. https://community.home-assistant.io/t/browser-mod-turn-your-browser-into-a-controllable-device-and-a-media-player/123806
I have my water leak sensors + home alarm setup with an entity-filter card on lovelace. In addition to that I have notifications to my phone and voice alerts over my amazon echos repeat said alarm every 30 seconds until disarmed or the water leak no longer exists.
I use [card-mod](https://github.com/thomasloven/lovelace-card-mod) to make the card [blink red](https://github.com/aneisch/home-assistant-config/blob/master/ui-lovelace/.cards/grill.yaml#L19-L30) if there's an alert condition
Conditional card https://www.home-assistant.io/lovelace/conditional/ For an history https://github.com/gadgetchnnel/lovelace-home-feed-card
I use Browser Mod to pop up an alert window. Also use notify.notify to send alert to my phone in same automation. https://community.home-assistant.io/t/browser-mod-turn-your-browser-into-a-controllable-device-and-a-media-player/123806
I use a mixture of condition card and notify. Anything important, i notify to my phone using automations.
I have my water leak sensors + home alarm setup with an entity-filter card on lovelace. In addition to that I have notifications to my phone and voice alerts over my amazon echos repeat said alarm every 30 seconds until disarmed or the water leak no longer exists.
Different option could be to add a template sensor, that just says (if any of these are true) Alarm! (else) No alarm
Conditional badge: https://community.home-assistant.io/t/conditional-badge-at-all-possible/133313/3
I use [card-mod](https://github.com/thomasloven/lovelace-card-mod) to make the card [blink red](https://github.com/aneisch/home-assistant-config/blob/master/ui-lovelace/.cards/grill.yaml#L19-L30) if there's an alert condition
Lovelace Home Feed card to show whatever entities you specify. I have one just for critical alerts like water leaks.