CAPE TOWN — Another tropical cyclone made landfall in Mozambique and other countries in East Africa on Thursday, just over a month since Cyclone Idai killed more than 1,000 people and displaced millions in the region.

The new storm, Cyclone Kenneth, was expected to bring heavy rainfall, flooding and winds of more than 120 miles per hour to Mozambique and Tanzania. Forecasters predicted it could be among the most powerful storms to strike East Africa in modern history, and as the cyclone moved toward shore, it killed three people in the island nation of Comoros, just off the coast, uprooting trees and ripping off roofs.

The storm was expected to dump as much as 13 inches of rain within 24 hours of making landfall, forecasters said. More than 700,000 people live in the cyclone’s path, according to the United Nations.

“This is another potential tragedy for Mozambique,” said Dorothy Sang, a manager for the aid group Oxfam who is based in Beira, the port city hit hard by Cyclone Idai last month. “We’re still struggling to scale up and meet the needs of everyone after the last cyclone. This will make it much harder.”