Global warming will be a contributor to the increasingly devastating effects of El Niño weather patterns that effect the Americas and Australia. Warming patterns will contribute to warmer Pacific seas that will then, in turn, bring El Niño effects to the shores of North and South America in what could be quite destructive weather patterns.
Background:
Devastating El Niño events to double this century [New Scientist]
Unchecked global warming 'will double extreme El Niño weather events' [The Guardian]
El Nino Patterns Could Become Twice As Likely In A Warming World [Huffington Post]