El Niño is a climate phenomenon characterized by the warming of ocean surface temperatures in the central and eastern tropical Pacific. This warming can disrupt normal weather patterns, leading to significant changes in rainfall and temperature across the globe. The effects of El Niño can be far-reaching, causing droughts in some regions and heavy rainfall in others. It plays a crucial role in influencing global weather, impacting agriculture, water supply, and even the frequency of natural disasters like hurricanes and floods.