South Western Ambulance Service NHS Foundation Trust responded to 3,941 incidents on Tuesday 26 May, making it the busiest day in the service’s history.
Between Friday and Tuesday, crews responded to 18,206 incidents, more than 24 per cent higher than the same period last year.
The ambulance service is urging people to use NHS services appropriately and only call 999 in a life-threatening emergency.
People are being advised to use NHS 111, pharmacies, GP services, minor injury units or urgent treatment centres where appropriate.
Chief Executive John Martin said crews are receiving calls for non-emergency issues such as sunburn and feeling hot, which can often be managed through other services.
The Trust is also urging people to stay hydrated, avoid strenuous activity during peak heat and check on elderly or vulnerable people.
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