Record-breaking early heat wave in southern West Africa made 10 times more likely by climate change, raising heat index by 4 degrees Celsius.

A record-breaking early heat wave in southern West Africa was made 10 times more likely by climate change, raising the heat index by about 4 degrees Celsius, according to a study by an international team of scientists. The unusually high temperatures in mid-February prompted weather agencies in Ghana and Nigeria to issue warnings to the public. The heatwave's onset occurred earlier than usual, leaving many people unprepared for the increase in temperature.