NHS England has advised the elderly to keep warm, whether indoors or outdoors. Statistics indicate that heart attacks and related hospital admissions are likely to increase immediately following cold weather.
“Hospitals also see a rise in the admission of stroke patients five days after the cold weather begins and peak respiratory admissions go up 12 days after the temperature drops”.
NHS England warns of increased risk of heart attack and stroke in the days immediately following a cold snap. [Online]: NHS England, December 11th 2017.
On the social isolation angle:
Cold weather and loneliness ‘lethal in winter’. London: BBC Health News, December 13th 2017.