Explain how the climate in a specific region differs during El Niño and La Niña

I know this isn't chemistry but I couldn't find Science!

El Nino refers to the phenomenon where the East Pacific Ocean is anomalously warm. This condition produces wet weather to the western countries of south America. Under normal conditions these areas are dry. El Nino also decreases rainfall and hurricane activity in the Atlantic and Caribbean region. Severe droughts will persist when this occurs. La Nina occurs when the temperature of the pacific is cooler than normal. When is occurs The Caribben and Atlantic experiences higher than normal rainfall and the South american coast is drier.