Well, that's bad and is only getting worse, but they are FAR from alone.
For instance, while the reservoir they showed looked to be about 40-50ft below full, I recently drove over Lake Shasta in N California, and it looks to be 200-250ft low! This is also due to 'climate change', which is turning what has historically been a wet rain forest into a desert.
We are already having water wars in our state. They WILL become violent eventually. Our dwindling sources of water in the North are being diverted to the far south...and somehow they pay less for our water than WE do! WTF?!?
And we are quickly draining aquifers nation wide, making it harder and harder to drill a well IF you are allowed to.
And insanely, where fresh water is not becoming scarce, we seem to be intentionally contaminating it so it's unusable, both above and below ground.
Just don't fool yourselves into thinking this is only a third world problem...it is not. First worlders use MORE water than those in the third world.

When a forest breathes in, it takes carbon out of the air. When it breathes out, it releases oxygen and moisture (which is drawn up from the ground.) If there is enough forest, the moisture actually changes the local weather conditions.

Unless you're talking about giant redwoods, which take moisture out of the air more than out of the ground, oddly. They have to live in fog belts in order to get enough moisture up to the top.
And unless you're talking about at night, when trees do aerobic respiration, and use O2 to make some CO2.

*british *water *nature *talks

Adding video to channels (British, Talks, Water) - requested by ant.

My take on this - stop immigration. A warmer earth means a more inhospitable area around the equator. Yet plant life will flourish in the more temperate zones - we're already seeing that with plants growing faster for longer of the year.

The crucial point of this is that if plants/forests are allowed to thrive in the current temperate zones whilst the earth population declines the planet will recover.

If we actively chop down the new plant-life to build homes for the people who's homes are becoming inhospitable we'll turn the planet into a dustball.