This article reports an exploratory study of climate change (CC) communication on the social network TikTok during the 2021Climate Summit (Glasgow, 1-12 November 2021), considered to be the last chance to halt the advance of CC. For this purpose, the 100 videos with the highest number of views during this event were examined by means of content analysis. The results have shown a new communication scenario in which influencers are the actors with the highest number of videos published in relation to CC. The media continue to be a fundamental actor in the communication of the CC and give continuity and relevance to the issue. Another remarkable result is an alarming situation: most of the videos do not cite any kind of source of information. The cases in which sources are mentioned are mainly media outlets which, in turn, do not report the origin of the data transmitted. It can be conclude...