Nature out-foxed

In the UK we have a temperate climate. We have trees suited to this, primarily with leaves not designed for hot or dry weather.

In addition their natural response to hot weather, is to transpire more, to create a cool layer of air around themselves.

So at a time when it is hot (and dry), with water less available, trees are using more.

If the trees were in a naturally hot and dry region, their leaves would be designed to minimise moisture loss. Waxy and smaller essentially.

This is why trees in the UK drop leaves when it is hot and dry, as they are a moisture losing liability.

Nature is not fast moving enough for trees to optimally respond to global warming.