One man died and four other people were taken to hospital with suspected heroin overdoses in just 48 hours, a hospital said.
It has prompted a warning from doctors about what they believe is a particularly potent batch of heroin being used in the area.
The medics say it is unusual to have so many separate cases of drugs overdoses in such a short space of time.
Olivia Paterson sent this report.
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A cloudy and misty start to the day however, during the morning, some brighter spells may develop. Still very mild.
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Low cloud and mist developing overnight. Another mild night ahead. Generally rather cloudy tomorrow, with a few brighter breaks developing.