To save her grandchildren from a fake problem, should Grandma turn her thermostat down and increase her risk of dying?

Cold snap brings threat of illness for elderly – warning - Health News - News - WalesOnline

Provisional excess winter deaths figures show that last winter there were around 1,700 excess deaths. The majority of these were among the elderly – with more than eight in 10 deaths in those aged over 75 and about six in 10 among the over-85s.

There are actions you can take to help protect your health and wellbeing during the winter, especially if you are older.
...
Homes should be kept warm. If you can’t afford to heat the whole house, then heat the rooms you spend most time in rather than just one room – 18-21C is a comfortable and safe temperature.