Don't we get this story ever year or two? Cue the images of people filling up water bottles from stand pipes at the end of the street...
I've yet to see this happen where I've lived either down South (my formative years) or up North where I am now.
The only things I've seen when we go through a hot spell, which apparently we will this year, is things like jetwashes for cars being shut down and people being advised to recycle water for the gardens etc.
However it always tickles me when we get reports like this, its generally in the middle of a massive rainstorm.