I have also heard that ocean temperatures had set records every month for over a year (though I've heard that, last month, they were "only" the second-hottest ever recorded for a July).  And, according to the graph, it looks like the ones for 2023 and this year have been a bit less than half a degree celsius higher than the previous range had been. 

So, have there have been previous years where there was this much of a temperature anomaly compared to other years?  If so, what impact did that have on ENSO?