The Met Office has issued an amber extreme heat warning for York and North Yorkshire amid fears for public health.

It says temperatures are set to build this week and could peak on Sunday, July 17.

The amber warning highlights "likely adverse health effects for the public, not just limited to those most vulnerable to extreme heat".

Temperatures could be in excess of 35C in the southeast, and more widely around 32C within the warning area, including York and North Yorkshire.

A statement from the Met Office said: “Population-wide adverse health effects are likely to be experienced, not limited to those most vulnerable to extreme heat, leading to potential serious illness or danger to life.

“Government advice is that 999 services should be used in emergencies only; seek advice from 111 if you need non-emergency health advice.

“Substantial changes in working practices and daily routines (are) likely to be required.

“Significantly more people are likely to visit coastal areas, lakes and rivers, leading to increased risk of water safety incidents.

“Delays on roads and road closures are possible, along with delays and cancellations to rail and air travel, with potential for significant welfare issues for those who experience even moderate delays.”

Network Rail has warned speed restrictions are likely to be in place this week on some parts of the network most affected by the hot weather.

It adds that this helps because slower trains exert less force on the track and reduce the likelihood of buckling, avoiding the major disruption caused by a buckled rail.

Dr Agostinho Sousa, Head of Extreme Events and Health Protection at UKHSA, said: “Heat-health alerts have now been issued to the majority of the country, with temperatures set to remain consistently high throughout the duration of this week.

“Most of us can enjoy the hot weather when it arrives, but it is important to keep yourself hydrated and to find shade where possible when UV rays are strongest, between 11am and 3pm.

“If you have vulnerable family, friends and neighbours, make sure they are aware of how they can keep themselves protected from the warm weather.’’

Fire services have urged people to have picnics instead of barbecues during the warm weather after a spate of grass fires.

The AA Driving School and RAC meanwhile said motorists should carry water with them, start their journeys earlier in the day, plan their routes and check their vehicles before setting off on any journeys.

RAC Breakdown spokesman Rod Dennis said: “An amber warning for extreme heat over such a wide area is rare and as a result we strongly urge drivers in England and Wales to think carefully before they drive, and do everything they can to avoid a breakdown.

“This starts with checking the coolant and oil levels under the bonnet when the engine is cold. Oil should be topped up if it’s low, and if coolant isn’t between the ‘min’ and ‘max’ levels then drivers should top it up – or take it to a reputable garage to get it checked without delay.”