They called Charles Hatfield the greatest rainmaker of modern times. The scene of his most spectacular achievement was in San Diego. He approached the city council in Dec 1915 with an offer - for $10,000, he would fill the reservoir at Morena Dam; if no rain fell, he would not be paid. He started Jan 1, 1916, by Jan 5 there was rain at the reservoir. By Jan 10 heavy rain fell, then a 10-day downpour began. Rivers overflowed, Lower Otay Dam broke, sending a 40 foot high wall of water 12 miles to the sea, demolishing everything before it.