France held a national day of mourning for Mayotte, its Indian Ocean territory devastated by a violent cyclone on Dec. 14, beginning in the morning on Monday with a minute of silence for the scores of residents left dead by the storm.

When Cyclone Chido ravaged Mayotte’s fragile infrastructure, it also exposed deep-seated tensions between the island’s residents and its large migrant population. Thousands of people who have entered the island illegally bore the brunt of the storm that tore through the Indian Ocean archipelago — France's poorest