Jesus did not say that before his return his Father would prevent earthquakes, floods etc.
Just as Ecclesiastes 9:11,12 states so it continues today:
"Again I saw that under the sun the race is not to the swift, nor the battle to the strong, nor bread to the wise, not riches to the intelligent, nor favor to the skillful; but time and chance happen to them all. For no one can anticipate the time of disaster. Like fish taken in a cruel net, and like birds caught in a snare, so mortals are snared at a time of calamity, when it suddenly falls upon them."
We are each subject to the possibility of sudden death everyday of our lives.
Sabrina