A red health alert for extreme heat has been extended for the West Midlands.
The warning, which was in place from 09:00 BST on Wednesday until 21:00 on Thursday, will now be in place until 23:00 on Friday, the UK Health Security Agency (UKHSA) said.
Other regions of England remain under an amber alert for the same period.
UKHSA said its alert indicated the heatwave could have an impact beyond health and social care, and potentially affect transport systems, food, water, energy supplies and businesses, and that there was a risk to life for even the healthy population.
West Midlands Ambulance Service (WMAS) said people often underestimated just how dangerous hot weather could be, particularly for older people and young children.
As well as the risk of dehydration, heat exhaustion and heatstroke, it said the hot weather also worsened existing health conditions.
