The UK only needs a few days of great weather for thunderstorms to roll in and this heatwave is running true to UK form in that it is very humid.
The high levels of humidity can feel draining.
For all the UK's peculiar weather we are never prepared for extremes. Sudden heavy snow in winter will halt trains; hell even falling leaves on tracks in autumn can do the same. It only takes a day of lovely hot weather for the 'it's far too hot' brigade to go into overdrive.
But employers rarely provide uniformed staff with summer and weather uniforms but rather a one season fits all. That can mean shivering workers in winter and sweltered ones in summer. And the UK is still way behind in the air conditioning stakes. Few homes have air conditioning and many older businesses don't either.
Tuesday evening a strong breeze that had whipped up during the afternoon offered a welcome cool down but that looks set to whip up sand from Africa and dump it in parts of the UK a not uncommon phenomenon these days.
Sand, heat and humidity has led to the usual health warnings and advice.
Check on any elderly and vulnerable friends, family or neighbours, especially if they have breathing problems.
Drink plenty of water and avoid the sunshine at midday; if shade is available-use it.
If you own a dog make sure it is not locked in a hot home or car for extended periods of time and make sure water is available at all times.
Most of it is not rocket science but common sense but hot sunny weather does strange things to us British.
The accident and emergency departments of UK hospitals are often busier in high summer than during heavy snow in winter; the problem is a type of summer madness that results in tree climbing, swimming in docks, ponds, reservoirs and often dangerous water and doing any number of other ridiculous activities.
However Wednesday's temperatures are expected to soar beyond the 'summer madness' stage and will leave most us exhausted.
Tennis at Wimbledon continues Wednesday and it will be a hot affair for the players and fans. After too many modern summers when rain ruined Wimbledon money was spent to ensure rain no longer stopped play.
For 2015 though it could be 'heat stopped play'!
The UK is set for a two-week heatwave which will please some and give the complainers something else to gripe about.