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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After what's been the hottest day in the region for almost 10 years there are warnings tonight about the dangers of swimming in open water.
Today was the hottest day of the year so far but temperatures will be down a little tomorrow with the risk of thunder.
A sizzling day for the Anglia region with temperatures rocketing into the mid 30's.