Part of the Royal Devon and Exeter hospital has been closed because of a gas leak.
Fire crews say a mechanical digger has caused a large gas leak in the road.
Eight wards have been evacuated and all non-emergency appointments have been cancelled.
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Jeremy Corbyn's visit has been one of the big talking points of another busy day at Glastonbury.
The Labour leader said socialist politics would not be put "back in a box" as he appeared on stage at the festival.
Turning windier with a few showers