As has been mentioned several times in this thread, there are other options besides doing nothing and spending $10-$20 thousand on a whole house generator.
As my local weather forecaster mused when her power went out, "I could
spend a LOT of nights at the Hilton for the cost of a whole house generator". Although a little tongue in check, there's some logic there too (assuming the outage is localized and hotels are available).
The events in Texas were unfortunate and tragic. Ironically, having a natural gas generator wouldn't have fared well given the gas problems. Gasoline portable generators would've faired better IF you had stockpiled a lot of gasoline ahead of time. Having a large propane tank and system was probably the best combination this time.
It's hard to anticipate all calamities in life. In the event of a flood, a portable generator can be easily moved to higher ground ahead of time. Like in the back of the used pickup truck you bought instead of a $12k generator.