This is probably a bit niche and tailored for Welsh Home Assistant users, but I have created an integration which connects with Natural Resources Wales to retrieve river level sensor information, useful if you live in a flood zone.
I plan to add Flood Alert/Flood Warning sensors soon, but for now it will pull the data for all of their river monitoring stations, and you can add as many as you like.
It’s my first integration, so go easy 
I was reading “Whales” and got curious what there was to integrate about them. 
All but the H apparently.
I will give this a try tomorrow, living on the border of Wales I use the flood data from England, the Welsh data will be nice to have.
Great. At present its just pulling the river levels, but I plan to get the flood alert/warning sensors in the next update.
It working as expected, was easy to set up just one thing. You might want to explain a bit more about how to get the API, you need to sign up to an account etc. The account is free so no issues. This was the only bit that took time to work out.
Thanks.
Thanks. I’ll update the documentation shortly.