India's monsoon, which is crucial for agriculture and water resources, is likely to be weaker this year due to the ongoing El Niño. The source notes that rainfall could decrease by 15% or more, although exceptions to this pattern have been observed in the past. Globally, the event is expected to cause droughts in regions like Indonesia, Australia, and Southern Africa, while some areas may experience excessive rainfall. The economic and humanitarian toll could be significant, particularly in regions dependent on rain-fed agriculture. Scientists also warn of potential 'unfamiliar effects' due to the overlap of El Niño with global warming.