It's a stark warning and one that should be considered carefully as summer heatwaves become more common.
There are indications the south-east could run out of water supplies in the next 20 years and warnings have been made by the Environment Agency, National Audit Office, the public accounts committee of the House of Commons and others but little has been done to address this problem.
As the population grows more water is taken from underground aquifers; water leakages from pipes waste 20% of supply, equivalent to three billion litres per day. The average water use per household is 142 litres a day and just using a hosepipe to water the garden can use 225 litres in 15 minutes. The south-east also has an average rainfall of 500-600mm - less than South Sudan and Perth in Australia, and London has a lower average rainfall than Barcelona, Istanbul, Miami or Sydney.
Last year the Environmental Agency estimated that summer rainfall in England is expected to decrease by 15% by the 2050s, and although the government made a commitment to a personal water consumption target by the end of 2018, nothing has been done (obviously); instead it is relying on water companies getting the message across with no evidence this has had any impact.
I know our water supplier, Severn-Trent, is one of the worst in the UK for poor quality and sub-standard infrastructure, despite the size of water bills in their region, and more should be done to ensure our water supplies are at least adequate to the growing demands of our society.
The American mid-west is having a big problem in keep reservoir's stocked and these pictures of
Lake Mead show how much has been lost over the last 20 years. The mid-west aquifer is also predicted to run dry before 2050 and would affect millions of people, making the dust-bowl conditions of the 1930s a catastrophe of biblical proportions.
Arab countries have invested heavily in desalination plants and maybe they could be used to keep the Garden of England green and growing for generations to come.