The heat health warning across the United Kingdom has been increased to its second highest level as Sheffield continues to bake on the hottest day of the year.
In response to the extreme hot weather, Simon Bottery, director of policy at Independent Age, the older people's charity said: "Older people can suffer adverse effects on their health during the hot weather and can be more vulnerable to heatstroke, heat exhaustion and dehydration".
Met Office spokesman Grahame Madge said: "It is likely that we'll have five days in a row with a weather station somewhere in the United Kingdom recording 30C or more - from Saturday until tomorrow".
6pm: The Met Office is predicting strong rainfall in the upcoming days.
The Chief Forecaster's assessment reads: "Thunderstorms developing from late Wednesday afternoon bring a greater threat of severe weather with associated torrential downpours giving as much as 30 mm or even possibly 40 mm in an hour in places". "Indeed many parts of the warning area will see dry and sunny weather through much of the daytime on Wednesday".
The mercury will keep rising all this week and not cool down until the weekend.
"However, fresher conditions will move in from the northwest into Thursday".
And as more hot air pushes north from France and Spain, an amber level 3 Government heat health warning - one tier below a level 4 national emergency - has been issued.
Temperatures today are expected to top 32C across the Midlands - which is above the point at which hot weather can impact the public's health.
A yellow warning for heavy rain has been issued for a large chunk of the country, stretching southwards from Edinburgh to the Home Counties.
Thunderstorms are expected to break out over Notts from late Wednesday onwards into Wednesday night, leading to torrential downpours, frequent lightning and a chance of hail.
They have said we need to prepare for the rain to be heavy and thundery at times in the early hours of Wednesday.