Visitors take pictures before dry cliffs following a prolonged drought at Victoria Falls
A visitor takes pictures before flowing water at Victoria Falls, January 17, 2019. Yet scientists are cautious about categorically blaming climate change. There is always seasonal variation in levels. Harald Kling, hydrologist at engineering firm Poyry and a Zambezi river expert, said climate science deals in decades, not particular years, "so it's sometimes difficult to say this is because of climate change because droughts have always occurred ... If they become more frequent, then you can start saying, ok, this may be climate change," he added.