water level

Since March 31, DWP crews had been refilling the reservoir as part of a gradual process that lifts the water level only a few feet each day.

"I can't tell you whether the temperature has risen in Thargomindah because of climate change or the water levels are up," he added.

Stephen Mumme, a political science professor at Colorado State University who is an expert in the treaty, said low water levels have left Sheinbaum in a bind: “There’s only so much Mexico can do.”

A police officer estimated the water level was 12ft below the top, the judge added.

He urged the Welsh government "to fund Welsh Water to continue to maintain water levels and keep all the operators of this canal in business - it cannot be lost".