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?