Since anthropogenic climate change was first noticed in the late 1980s, despite scientists’ consensus on its urgency and seriousness with strong evidence, climate risk is still a tough issue for the public to engage with due to its ambiguity, invisibility and uncertainty. This article reviews the emotive and empathetic role of climate fiction (cli-fi) in climate change communication, using the precautionary principle of relevance to sustainable development to discuss how cli-fi has influenced the way people feel and think about climate change and further foster pro-environmental attitudes and opinions. Through discussing the effectiveness of cli-fi as a communication tool, I argue that cli-fi allows readers to visualise the implications of climate change on themselves and triggers their empathetic and emotional responses, especially negative emotions. Those emotions, on the one hand, could arouse a wider and deeper climate consciousness by inspiring audiences to consider previously unnoticed subjects; on the other hand, could facilitate affective engagement and the perceived need for action.