The literature on social media use in risk and crisis communication is growing fast, and it is time to take stock before looking forward. A review of 200 empirical studies in the area shows how the literature is indeed increasing and focusing on particular social media platforms, users, and phases from risk to crisis relief. However, although spanning 40 countries, a large proportion of the world’s social media users are under-represented in the research. In addition, little attention is given to the question of who is actually reached through social media, and the effects of the digital divide are rarely discussed. This article suggests that more attention is given to the questions of equal access to information and ICTs, complementary media channels, and cultural diversity.