What on earth is going on with our weather? Three months’ worth of rain fell in a few places last week, Britain is drowning under floods of biblical proportions and nothing like it has been seen since Noah got his sea legs. In a wave of hysteria, the cry goes out for millions of sandbags, better drains and more flood defences. And fingers of blame are pointing at global warming.

But a simple fact has been overlooked: Britain is a wet country. Yes, it comes as a shock. Over the past few years we’ve become so used to years of scorching, Mediterranean-like summers, when hosepipe bans were the norm, vines were bursting with vintage grapes and water diviners were doing big business. But the truth is that our summers are supposed to be wet: it’s our climate.

The accoutrements of the British summer holiday were thick pullovers and waterproofs. You expected to shiver on wet promenades, “Rain stopped play” was the national mantra and sunblock cream was something for film stars and models. That is why the August Bank Holiday was shunted to the end of the month, because the beginning of August was so awful.

Of course, British summers weren’t always as wet as this year’s, but some were certainly worse. 1912 was the wettest and dullest summer on record, far ahead of this summer’s downpours. It pretty much rained all summer, reaching a peak in late August, when a seven-inch downpour in one day in Norfolk left Norwich completely marooned in a sea of mud and devastation. Even that deluge is overshadowed by the 11 inches of rain that fell in less than a day on Dorset in July 1955 – about half of London’s yearly average rainfall. The longest nonstop rainfall record in the UK was more than 58 hours in London during June 1903, in a summer when there was an epidemic of lung disease in farmworkers caused by mouldy hay and grain.

Farther back still were the sodden summers of 1845 to 1850, when jungle-like humidity and relentless rains triggered the potato blight outbreak that led to the great Irish potato famine, in which a million people died and another million emigrated from Ireland.

Rain is only the half of it. The abysmal summer of 1956 was an assault course of monsoonal rains, big floods, giant hail, houses set ablaze by lightning, howling gales and miserable cold. Just to rub it in, August was one of the coldest and wettest on record across Britain.

It is a very human tendency to blame someone for the vagaries of the weather. A run of bad summers in the 1950s was blamed on nuclear bomb tests, the rains during the First World War were blamed on artillery going off on the Western Front and two centuries ago it was the battles of the Napoleonic Wars that were blamed for upsetting nature. And now it’s global warming.

But climate change was supposed to be making our summers drier, not wetter. Leaving that aside, even if we accept that the recent downpours are a sign of global warming, then a single wet summer hardly adds up to any particular trend. No, it’s far more plausible to explain this latest wet spell as a natural blip in the climate.

If so, then which politician or minister is going to have the courage to propose spending billions of pounds on building new river walls, embankments, ditches and other flood defences? How will we feel about spending large sums of money on such big projects when next year may bring another drought – and the inevitable demands for more reservoirs, leak-proof pipes and desalination plants?

And let’s not forget that an even greater threat comes from the sea. A recent study reveals that London and the Thames Estuary is subsiding faster than anyone had estimated; and with sea levels rising relentlessly, the Thames Barrier is looking increasingly vulnerable. We need to fix that problem before London disappears under a storm surge like New Orleans.

The hysteria over this summer reveals more about our education. The daily forecasts and news reports are all facts and no explanation about why the weather is behaving the way it is. The explanation for the past few days of drama is that Britain lies in a part of the world that is finely balanced between wet and dry, warm and cold weather. The dividing line is the jet stream, a river of wind rushing overhead a few miles high. This summer the jet stream has been very sluggish and buckled into big loops, leaving Britain drenched on the wet side of one of those loops. However, on the other side of the jet stream large parts of Europe are roasting in a ferocious heatwave that has killed dozens of people and brought wildfires blazing across Greece.

This European split has happened before. In the summer of 2002, a large swath of Central Europe was battered by rains that set off huge floods along the Elbe and Danube, drowning more than 100 people.

But there is another story about this summer that has gone virtually unnoticed. Despite all the gloom and doom, temperatures are fairly normal for the time of year. In days gone by, a wet summer would invariably be cold, even with snow in July and frost in August.

The prize for the most diabolical summer of rain and cold should be awarded to that of 1816. Not for nothing was it called “the year without summer” – this time of great storms, massive rains and appalling cold led to the crops rotting, the price of bread soaring and food riots breaking out. Some 200,000 people died of famine across Europe, which was then followed by a typhus epidemic.

So, let’s look on the bright side. At least we haven’t got any hosepipe bans – and the reservoirs are full.

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