They can only survive short duration events. At some point the temp and time is too much and they die. The only way they come back is reintroduction.
We’ve lost over 50% of the reefs and are expected to lose 90% by 2050.
There are many amazing solutions. Some use corals more resistant to heat stress. Australia has seen some promising results with seed boxes. I know of a few other amazing solutions currently in the lab.
We have already gotten in natures way. So now we need to help nature with our technology.
I guess the best help, would be stop getting into natures way so brutally, but since transforming the whole industry takes time and making people aware and care is even harder, some technical solutions to offset some damage is of course welcome.