The heat has caused fires, travel disruption and power cuts.
Emergency services in South Yorkshire, East Yorkshire and North Yorkshire issued "major incidents".
Yorkshire Water has announced a hosepipe ban as a result of the continued dry weather.
In a statement issued by the company, it revealed that parts of Yorkshire had seen the lowest rainfall since records ban more than 130 years ago.
1. Yorkshire heatwave
Cooling off in Sheffield city centre.The Met Office has issued an 'extreme' amber heatwave warning for many parts of Yorkshire with high heat expected to last until Sunday August 14 Photo: staff
2. Yorkshire heatwave
Farmers pass fireweed as they take advantage of the long hot dry weather to harvest the wheat in fields close to Thixendale in the Yorkshire Wolds. Photo: staff
3. Yorkshire heatwave
People enjoy the hot weather in Museum Gardens York, as the heatwave continues Photo: staff
4. August heatwave
The water has stopped flowing at Aysgarth Falls in Wensleydale due to the prolonged spell of hot dry weather this summer Photo: staff