THE Met Office has issued an amber warning for extreme heat for parts of England and Wales as a new heatwave looms.

Scotland looks set to avoid soaring temperatures, with most of the hot weather expected to cover most of the south of England, eastern Wales and as far north as Manchester.

The warning is in place from Thursday to Sunday, with the Met Office warning of travel disruption and adverse health effects.

The National:

Meanwhile, a heat health alert from the UK Health Security Agency comes into place across much of southern and central England from midday on Tuesday until 6pm on Sunday.

Experts are advising people to look out for those who are older or with existing health conditions, as well as young children.

Tory leadership frontrunner Liz Truss, meanwhile, has weighed in after two water companies in southern England announced hosepipe bans and others warned they may need to follow suit, following the driest eight months from November to June since 1976 as well as the driest July on record for parts the country.

READ MORE: Weather in Scotland: Will there be a heatwave this week? Here's what the Met Office says

Truss said: “My view is that we should be tougher on the water companies and that there hasn’t been enough action to deal with these leaky pipes which have been there for years.

“I have a lot of issues with my water company in Norfolk, which is a particularly dry area of the country, and those companies need to be held to account.”

She told the Daily Express hosepipe bans “should be a last resort”.

“What I’m worried about is it seems to be a first resort rather than the water companies dealing with the leaks.”

The amber heat alert “requires social and healthcare services to target specific actions at high-risk groups”, but is one stage lower than the most serous level four red warning issued in last month’s heatwave.

The National:

The Met Office said temperatures over coming days will not be as extreme as the record-breaking heat in July when the thermometer climbed above 40C, however it is still likely to rise into the low to mid-30s in central and southern parts of England and Wales.

South-east Scotland could see temperatures widely in the high 20s, with a chance of a few spots seeing temperatures into the low 30s, the Met Office said.

Overall Scotland and Northern Ireland will see temperatures in the high 20s and could reach official heatwave criteria by Friday, forecasters said.

With the latest heatwave coming after months of low rain, which have left much of England's countryside, urban parks and gardens tinder-dry, households in some areas are being urged not to light fires or have barbecues.

The Met Office’s fire severity index (FSI), an assessment of how severe a fire could become if one were to start, is very high for most of England and Wales, and will reach “exceptional” for a swathe of England by the weekend.

Scientists warn that the likelihood of droughts occurring is becoming higher due to climate change, driven by greenhouse gas emissions from burning fossil fuels and other human activities.

Climate change is also making heatwaves more intense, frequent and likely – with last month’s record temperatures made at least 10 times more likely because of global warming, and “virtually impossible” without it, research shows.