Cyclone Herold

The first alert, a green alert (issued two to five days before the storm's potential impact[7]), was issued on March 13 by Météo Madagascar for the areas in northeastern Madagascar.[8] The next day, the alert was upgraded to a yellow alert (issued one to two days before storm, storm is going to be damaging area but it has not truly happened yet[7]).

On 18 March, a class four cyclone warning was issued for Rodrigues.[9]

Herold stalling near the coast of Madagascar on 14 March

Heavy rain was recorded in northeastern Madagascar on 13 March.[10] 95 mm (3.7 in) fell on Sambava that same day. Intense flooding occurred in the Ankavanana River, which threatened more than 1000 people. Five people were killed in the Sava Region. Flooding impacted more than 100 schools. Homes were swept away in areas near Maroantsetra.[11] Near the Andranofotsy River, people were most affected. By 17 March, though, the water level had decreased a fair amount in the community.[12][13] That day, the water level on land rose to 2 meters (6.6 feet). 13 of 20 municipalities in the Maroantsetra district were underwater and 28 houses had been destroyed in the town of Mahalevona.[13] In Maroantsetra, 104 homes were affected by the storm surge. A school in Anjanazana was found with puddles of mud in its classrooms.[14] The effects of Herold didn't end until the cyclone alerts were lifted on 17 March for the entire island.[15] 911 homes were flooded. 178 huts were damaged, and 127 residencies were destroyed in Madagascar.[16] In Maroantsetra, 79 classrooms were damaged, and 24 were damaged in Sainte-Marie.[17]

In the Mascarene Islands, maximum sustained winds of 185 km/h (115 mph) was recorded.[18] When Herold passed in between the islands of Mauritius and Rodrigues on 17 March, it made schools close and caused eighty people to seek refuge in accommodation centers. In the islands, damage was minimal. In most areas, it was limited to downed trees and power outages. However, a gust of 130 km/h (81 mph) was recorded in Sir Gaëtan Duval Airport. Maximum rainfall was no more than 29 mm (1.1 in).[11][19] Herold also briefly passed over Réunion. There was no known damage there.[20]