From Aleteia:
At the start of the 20th century a great undersea earthquake shook the Pacific Ocean and casued a tsunami that devastated the shorelines of many cities. However, according to the local inhabitants of Tumaco, Colombia, a huge wave was pushed back when the local priest processed out with the Blessed Sacrament.
The people could see the giant wave approaching the city and so Fr. Larrondo gathered up his courage and with the Holy Eucharist placed in a monstrance, processed head-on towards the wave. He said to the people, “Let us go, my people. Let us go toward the beach, and may God have pity on us.”