A powerful El Niño is intensifying, which may lead to a stormy and very wet winter in California with increased rainfall. There is a growing likelihood of extreme weather, with some forecasts suggesting the development of a "super" or "Mega El Niño" that could be one of the strongest on record. The exact outcome and timing are uncertain, but various organizations, including NOAA and the World Meteorological Organization, are warning of the potential for severe weather.