Earlier quoted context omitted.
Where are you from exactly? I live in Europe and 2 blackouts in 3 years would still be an outrage. (To be fair, we have less natural disasters.)
We're missing a lot of context. San Antonio is in Texas, which means these could have been rolling blackouts, one of the last-ditch efforts employed by power companies during record summer temperature spikes (which translate to monumental load spikes in the form of A/C)
So, you're right that we're missing a lot of context - including the duration. A 30 min outage due to an accident is very different from a 3 day outage due to a storm.
And like you said, AC can be a big drain on the grid during the summer.
(Disclaimer: I'm not sure what the weather in San Antonio is like...)