The scientists believe this switch in the climate was the trigger for the first of the plagues.
The rising temperatures could have caused the river Nile to dry up, turning the fast flowing river that was Egypt’s lifeline into a slow moving and muddy watercourse.
These conditions would have been perfect for the arrival of the first plague, which in the Bible is described as the Nile turning to blood.
Dr Stephan Pflugmacher, a biologist at the Leibniz Institute for Water Ecology and Inland Fisheries in Berlin, believes this description could have been the result of a toxic fresh water algae.
He said the bacterium, known as Burgundy Blood algae or Oscillatoria rubescens, is known to have existed 3,000 years ago and still causes similar effects today.
He said: “It multiplies massively in slow-moving warm waters with high levels of nutrition. And as it dies, it stains the water red.”
The scientists also claim the arrival of this algae set in motion the events that led to the second, third and forth plagues – frogs, lice and flies.