what is el nino rain

El Niño rain is a weather phenomenon that occurs as a result of El Niño, which is a climate pattern that describes the unusual warming of surface waters in the eastern tropical Pacific Ocean. During El Niño, warm water builds up along the equator in the eastern Pacific, and the warm ocean surface warms the atmosphere, which allows moisture-rich air to rise and develop into rainstorms. El Niño can cause a range of impacts, such as increasing the risk of heavy rainfall and droughts in certain locations around the world. In South America, El Niño brings rain, while it brings droughts to Indonesia and Australia. In the United States, El Niño can cause the Pacific jet stream to move south of its neutral position, resulting in dryer and warmer than usual conditions in areas in the northern U.S. and Canada, and wetter than usual conditions in the U.S. Gulf Coast and Southeast.