I live in a town on the banks of the river Severn. I've lived here for over 60 years and for the first 6 years lived close to the river and our home was flooded regularly, at least once, every year, sometime between November and March.
Severity of flooding varied. I think in the 6 years we were affected directly, there were 3 major floods, the first being 6 weeks after we first moved in. We did, however, experience around 10 floods during our time there.
I later moved further away from the river but still in the same town. I think, as others have said, there are many factors involved when considering the current situation.
Climate change, lack of investment, building on flood plains, deforestation etc.
One or two other things come to my mind too.
Back in the 1960s, it was largely poorer people who lived in the cottages on the banks of the river. Not many had electrical appliances, fitted carpets or expensive furniture. Most of the homes had been lived in by generations of the same family so they were very well organised and knew what to expect and what to do when flooding happened.
There was no social media and rolling news to fuel a kind of mass hysteria when the river did what it had done for centuries. The local TV news paid a visit, filmed a bit and did some interviews and that was it.
We went through a period in the late 80s and early 90s when the river hardly flooded at all then, it reverted to its natural behaviour with some spectacular flooding in the the early 2000s. This precipitated visits from royalty and politicians and worldwide coverage.
I doesn't seem to have stopped since. Every year, when the river floods, the same thing happens, only now we get demands that "they" should do something about it.
Fortunately, we now have the technology to build effective flood defences to protect homes and businesses. Something that wasn't available 30 years ago.
Severe flooding mostly caused by heavy rainfall, does appear to be on the increase. Maybe it is climate change, maybe other factors, combined with it. Maybe it will get worse, maybe it wont I don't know. I don't know how far back records go either. The furthest back in time I could get was a record of a flood in Worcester in the 1640s.
Apparently, it was the worst flood since the time of Noah.
Now there's a thought!