SOUTHERN AFRICA: Human-caused climate change worsened recent torrential rains and floods that devastated parts of the region, killing more than 100 people and displacing hundreds of thousands, researchers said today. A study by the World Weather Attribution of the recent heavy rainfall that caused severe flooding in parts of South Africa, Mozambique and Zimbabwe showed that those countries had experienced a year’s worth of rain in a period of 10 days. It caused damage to housing and infrastructure estimated to run to millions of US dollars. Videos apparently from the scene showed loud blasts and the sky glowing following explosions that began around midnight and lasted about two hours in the area of Diori Hamani International Airport, a key hub for Niger’s military. Officials did not give a cause for the crash but promised an investigation.