We spend a lot of time monitoring our internal networks. Obviously, this is where we have the most tools at our disposal and where our actual responsibility lies. But, to provide good service to our customers and/or end users we also need to be aware of what is happening at our Internet providers and above. If you have global services then I recommend you monitor the submarine cables as well. For example, this was the latest submarine cable damage that impacted regions in Africa.
Here is a map of the cable(s) that were impacted.
If you want to go further and receive notifications on your mobile device then you can use the IFTTT app I created.