Brits are being urged to keep their homes heated to 18C as a level 3 cold weather alert issued by the UK Health Security Agency for large swathes of England has been extended until Thursday morning.
The level 3 alert is in place for the North East of England, North West of England, and Yorkshire and the Humber, while a level 2 alert is in place for the West Midlands, East Midlands and East of England for the same period.
Dr Agostinho Sousa, Head of Extreme Events and Health Protection at UK Health Security Agency (UKHSA), said: "As cold weather persists throughout the rest of the week, it is important to check in on the wellbeing of those most vulnerable to the cold.
"Cold weather can have a serious impact on health, particularly older people and those with pre-existing health conditions, as it increases the risks of heart attacks, strokes and chest infections.
"If you have a pre-existing medical condition or are over the age of 65, it is important to try and heat your home to at least 18°C if you can."
The cold weather alert comes as millions of Brits have been warned of yet more snow and ice potentially making people's lives a misery in the coming days.
A yellow warning for snow and ice has been put out by the Met Office this morning and extends from Monday into Tuesday.
The new alert covers all of Scotland, parts of Wales and extends as far south in England as Birmingham.
People are still recovering form the ongoing snow showers which battered the country on Saturday.
The Met Office said: "Cold air spreading southwards across the UK, following a band of rain, sleet and snow, will bring frequent snow showers to northern, western, and eastern Scotland, as well as parts of Northern Ireland.
"Overnight, these will accumulate on some roads and pavements, with anywhere between a light dusting and several cm of snow possible.
"Between the showers, partially melted snow is likely to freeze on untreated surfaces leading to icy stretches.
"Wintry showers will continue through Tuesday, although by mid-morning the temperature on most roads will likely have risen sufficiently to reduce the risk of further accumulating snow or ice."
It adds rain will turn to snow bringing the chance of "some disruption to transport and infrastructure".
Icy surfaces are also likely later, making some routes impassable.
