LDS apostle's impromptu warning circles the globe

[Wingnut]

Can someone please explain this to me? I thought that God gave up calamity as a form of punishment. Sunday school taught me that rainbows are a promise from God that he will never flood the earth again or use earthquakes/volcanoes/asteroids/tidal waves/etc. as a way to encourage humility and get us to pray differently.

Is this a hearkening back to the fear of the "end times"?

The rainbow was tied to the flood. We know from reading the Book of Mormon that there were natural calamities and destruction at the time of Christ's death.