Another heatwave is descending upon the UK, because apparently the planet has decided that British summers should now resemble a slow roast. The Met Office forecasts peak temperatures of 34C in the south-east by Thursday or Friday, just in time for everyone to remember they don't have air conditioning.

Temperatures in the south of England could reach 28C on Saturday, according to the Met Office. A week-long health warning from the UK Health Security Agency (UKHSA) kicked in at midday on 4 July, covering the east, East Midlands, West Midlands, south-west, London and the south-east until 8pm on 11 July. The agency warns that vulnerable people face a greater risk to life, and there might be an uptick in water-related incidents due to cold water shock and drowning. So, stay out of the water and out of the sun - got it.

Met Office meteorologist Becky Mitchell notes that this heatwave won't be as hot and humid as last month's scorcher, but it will be a prolonged spell of hot weather lasting about a week. Northern areas get clouds and rain, because the UK can't have nice things uniformly.

Meanwhile, Southern Water has announced a hosepipe ban starting 12.01am on 10 July in Hampshire and the Isle of Wight. No watering gardens, filling paddling pools, or washing cars. The ban is a gentle reminder that water is a finite resource, and we just used a lot of it in June's heatwave.

This latest alert follows a rare red warning for extreme heat last week, when the UK set a provisional June temperature record of 37.7C in Lingwood, Norfolk, beating the previous record of 35.6C from 1976. Met Office projections indicate that hot spells will become more frequent, particularly in the south-east. In other words, get used to it.