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So the heatwave in Europe right now is caused by a phenomenon called a heat dome. It's a huge area of high atmospheric pressure, which has enough influence that it forces the Jet Stream to divert around it. The unusual Jet Stream behaviour is drawing hot air North from the Sahara, which is making Europe so abnormally hot.
Apparently, some meteorologists nickname this an omega block, because it blocks off the Jet Stream and pulls it into kind of a Ω shape.
Earth: I shall have a nice stable Jet Stream to help regulate my climate
Humans: 
Earth: 
〜oh no
@InvaderXan ...You say "omega block," but I immediately went to: 
@InvaderXan It looks also like the same pattern is extending through Asia and delivering some mighty weather to Japan...
(Other places, too, just Japan's a personal favorite.)
Similar happened with the polar vortex, I thought - patterns "locked" into place.
@OldBrushNewPaper Oh, that's interesting. I didn't realise there was something similar over Asia right now. Though with the increase in extreme weather patterns, it's sadly unsurprising...
@InvaderXan thanks for your explanation
@InvaderXan A giant omega over Europe. Darkseid isn't exactly subtle, is he?
@InvaderXan are you telling me we had a chance to say "Europe is suffering under the effects of a major OMEGA BLOCK" and be scientifically accurate!?
@Eldritch_Horrorgirl Yes, and you should totally start telling people that :P
@InvaderXan that’s not completely fucking ominous or anything, like at all.
@InvaderXan it also looks sort of like lower case omega
@InvaderXan that looks like the 
character 
Soff
I'm gonna call this the shrug block because
¯\_(ツ)_/¯
@InvaderXan I thought they just called it the omega dome because it sounds badass?
@InvaderXan do you know if this pattern the omega one, is here to stay in that shape.
Or if it is a snapshot of now and that it will change some more, as in this is more of a transition to somethig else.
(If the answer is too complicated, it is fine to just say so and leave it there)
Fascinating and scary too, thanks for sharing
@kyzh Honestly, I'm not a meteorologist so I can't guarantee how accurate my answer may be.
I do know that heat domes are persistent but temporary, but I don't know what causes them to form and if there may be something causing them to form more frequently in the future. Weather systems are complex and interconnected. It may be impossible to predict, for all I know.
@InvaderXan Do you know if this is temporary?
@samftblaetr This one is persistent but temporary. Though I have no idea how likely it is for another one to form.