The Met Office say the West Midlands is likely to be the most affected by the heatwave over the next 24 hours.
They've increased their warning from level 2 to level 3. Level three means action needs to be taken by healthcare providers to target high-risk groups like the elderly.
The East Midlands remains on level 2 alert.
As emergency and social services prepare for the heat there are things you can do to stay cool and enjoy the weather safely.
We could be in for the longest spell of hot weather since 2006 as the heatwave shows no sign of stopping. But why is it different to others?