I am old enough to remember my first heatwave. It was 1947, the summer after one of the longest, coldest winters on record. My aunt and uncle, home on leave from Northern Rhodesia (now Zambia), bought a huge inflatable rubber dingy and set it up on my granny's croquet lawn. We three and our cousins, all girls, had a wonderful time splashing about and the dads got in on the act. It was the first time I'd seem my dad in swimming trunks; he had, until then, worn a bathing costume of a kind that has never been seen since! I don't remember how long it lasted or how high the temperature went, after all I was only 6, but a lovely summer like that was a wonderful treat for us and our parents.