I'm not sure why you're trying to build up what CIA means by inventing scenarios.

https://en.wikipedia.org/wiki/Information_security#CIA_triad

> For any information system to serve its purpose, the information must be available when it is needed.[78] This means the computing systems used to store and process the information, the security controls used to protect it, and the communication channels used to access it must be functioning correctly.[79] High availability systems aim to remain available at all times, preventing service disruptions due to power outages, hardware failures, and system upgrades.[80] Ensuring availability also involves preventing denial-of-service attacks, such as a flood of incoming messages to the target system, essentially forcing it to shut down.[81]

https://www.fortinet.com/resources/cyberglossary/cia-triad

> If, for example, there is a power outage and there is no disaster recovery system in place to help users regain access to critical systems, availability will be compromised. Also, a natural disaster like a flood or even a severe snowstorm may prevent users from getting to the office, which can interrupt the availability of their workstations and other devices that provide business-critical information or applications. Availability can also be compromised through deliberate acts of sabotage, such as the use of denial-of-service (DoS) attacks or ransomware.

https://online.utulsa.edu/blog/what-is-the-cia-triad/

> Software bugs or misconfigurations. Incorrect software configurations or glitches can cause system outages.