"In March 2019, Cyclone Idai brought death and destruction to Malawi, Mozambique and Zimbabwe as a result of heavy rains and extensive flooding (Figure 1). The respective governments together with UNICEF and other partners, responded swiftly to the disaster. Rescue and relief operations were implemented immediately, saving many lives, and resources were rapidly mobilized to provide food and non-food items to people in the affected areas. As part of the initial response, UNICEF conducted a rapid knowledge, attitudes and practices (KAP) survey on the information and communication needs of the most affected people in all three countries. The findings informed the lifesaving multisectoral C4D interventions which played a key supporting role in all three countries (Table 1). The experiences of the three countries in successfully mainstreaming C4D across the Cyclone Idai response offer valuable learning for future humanitarian emergencies." (Introduction)