That is a great visualization tho!
doomer
What is Doomer? :(
It is a nebulous thing that may include but is not limited to Climate Change posts or Collapse posts.
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Bruh. 
Jesus fucking christ. Is there anything we should be doing to prepare for this? Like stocking up on anything?
Depends where you are

But regardless of that, stock up on clean drinking water, or a way to filter some. That's the first thing that disappears regardless of location or disaster, and you'll die pretty quick without it.
Air conditioners maybe? And if your local electrical grid is likely to be overloaded because it was privatized and is being run into the ground by profiteers, I guess solar panels and batteries.
Not exactly cheap things to stock up on.
Yes you should stock up lol
Am I reading this right? 3-4 degree change by the end of the year wtf?
This is the forecasted temp anomaly in the NIÑO3.4 portion of the Pacific ocean not a global anomaly for clarification. The excess heat from climate change is absolutely helping feed this El Niño due to hotter oceans in general (and the hotter oceans will potentially respond to El Niño in unpredictable ways compared to past El Niños). It's a really nice visualisation of how predictions have repeatedly been revised upward this year though.
and the hotter oceans will potentially respond to El Niño in unpredictable ways compared to past El Niños
Yea, something breaking (air, ocean currents) will be a much bigger problem than just higher average temperatures.
The excess heat from climate change is absolutely helping feed this El Niño due to hotter oceans in general
Yes, but also ENSO is measured compared to the 1991-2020 average, so over 0.5C warming is already baked into the ENSO neutral position.
This is obviously just a short-term snapshot, but temperatures are already looking a bit toasty in the ENSO region.

Yes this is a measure of the seasonal change resulting from this year's "El Nino." Here is a graph of previous El Nino and La Nina events: https://ggweather.com/enso/oni.htm . The previous biggest temperature swing was 2.5 degrees, back in late 2015, early 2016.
So, yeah, it looks like the feedback loops have started. Warming is accelerating.
we gotta get big x-axis on this too