Oceans experience record heat

The surface of the world’s oceans warmed more in April than at any time since record-keeping began. On average, the water temperature rose to 21.1 degrees Celsius in early April, according to a series of measurements by the US University of Maine. This surpassed the previous high temperature of 21 degrees, measured in 2016. At the same time, reports of heat waves in the oceans are increasing, for example in the southern Indian Ocean and South Atlantic and around Australia and New Zealand.