Ryan Maue purposefully uses language like this to generate reactions on social media, particularly from people who use such tweets as examples of anthro climate change proponents being "extremists" or "doomists". It's funny, because beneath that veil he likely is more aligned with the people who get reactionary when he uses such phrases as "climate breakdown". He served as the chief scientist at NOAA under Trump, and at the time was known for minimizing humanity's role in recent climate trends. Maybe that implies that there's a good bit of sarcasm in that tweet's wording, but it is not the first time he's done such a thing.