Scientists from across Europe are in Cumbria to discuss flood prevention.
They're using model simulators to demonstrate how rivers flow and investigate different ways to protect people and their property.
Experts, such as Dr Lucy Butler from the Eden Rivers Trust, say they can learn from colleagues on the continent.
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Christian Pay's family say he was "loved by all" and had "the heart of a lion". The 18-year-old died after falling ill at the festival.
The first of seven races will begin at 5:45pm, and 76 horses are competing. The UK's top female jockey is amongst the competitors.
Thousands of people are expected to flock to Brampton to catch a glimpse of the colourful breed, which is more common in warmer climates.