The NHS Blood and Transplant Service says almost half the donors in the East are aged 45 or over and they need to encourage more young people to roll up their sleeves and start giving.
With hospitals across the country using 7,000 units of blood every 24 hours the service needs to attract 1,000 new donors each day to keep stocks sustainable.
Click below to watch a report by ITV News Anglia's Serena Sandhu:
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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.