The extreme hot weather is putting extra strain on staff as the number of patients showing up at Great Western Hospital increases.
The Urgent Treatment Centre is seeing more people turning up with sunburns, heat exhaustion and sore throats.
A Great Western Hospital spokesperson said: “As the hot spell of weather is expected to last for the rest of the week, we want to remind people to keep cool and avoid heat-related health risks.
“If you are unwell due to the heat or if you are unsure what to do, please visit 111.nhs.uk or call 111 first.
“If NHS 111 decides that you should attend the UTC, they can get you a timed arrival slot and you can stay at home until then.”
The UK's first extreme weather warning has been issued for Swindon and the South West until at least Thursday.
READ MORE: First Met Office extreme heat warning issued for Swindon and South West
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