Meteorologists speak of ridges (which are the opposite of troughs) or high geopotential heights. These heights are estimated at the altitude of the 500 hPa (or mb) pressure level. The height of this pressure level varies to form ridges and troughs. They are moving eastward as described by Rossby waves system. But sometime the motion of these waves is blocked: The ridge can stands several days on the same area.

The frequency of this type of blocking and of the high ridges of hot air seem to increase with the climate crisis. Under the ridge, the air is sinking, compressed and heated, leading to severe drought with all consequences we know for people and nature.

*There were five hear domes around the world: https://www.google.com/amp/s/www.independent.co.uk/climate-change/heatwave-weather-map-heat-dome-2021-b1888673.html%3Famp

I was thinking of anomalies or changes that are observed and can be presented on a global or continental level. For example, there have reports of four or five 'heat domes' in North America with extreme temperatures in on the west coast, which are related to the changing climate. As a layperson, the term is new to me, I have no insight into this phenomena and how to interpret it.

Other aspects which might be of included are ocean acidity, polar ice cover, desertification and (as someone said) extreme weather events.

Maybe it could be presented as an occasional information bubble with an explanation of what is happening and why?