What El Niño events do is bump sea-surface temperatures up by a degree or two. That's equivalent to looking a few decades forward to see what an equivalent whole-globe temperature rise might look like, excepting such issues as general ice-cap melting (Antarctica & Greenland), though including accelerated glacial melting in regions seeing EN warming.

But for at least some weather, wildfire, drought, crop-yield, and species-adaptations (both invasive and extinctive) potential, we're getting an early look at what's already in the pipeline.

It's also a warning that future EN events, on top of further warming, will likely be much worse.