I like to have the local Police/Fire/EMT scanner on in the background when I'm working on my computer. (Always good to have some advance warning when they're coming for me.) Once upon a time you had to have special (moderately expensive) radios to listen, but now it's all online, which is really amazing. The big site is:
https://www.broadcastify.com
I can sit here in the US and listen to local police scanners from Australia, or from the town next door. Visit that site and find your local area and take a listen.
Still trying to work out an assortment of codes used locally. They aren't nationally standardized and vary from one jurisdiction to another. So far it seems to be:
1500 - firearm
1800 - drugs
2300 - alcohol?
3900 - suicide threats
4300 - mentally ill
I think there are a few others I haven't figured out.
_________________
There Are Four Lights!