Floods across central Europe forced factories to closed, drove thousands from their homes and killed at least eight people.
Sandbags have been piled up by volunteers to keep a swollen river from overwhelming the Czech capital Prague's historic centre.
Six people died in the Czech Republic from the worst flooding in a decade and a state of emergency was declared, while in Austria two people died and another two were missing.
More top news
Shadow business secretary Rebecca Long-Bailey has called for "immediate" relief to prevent thousands of companies going out of business.
A spokesperson criticised the behaviour of a "small number" of fans at the game between Birmingham City and the Wolverhampton Wanderers.
Those taking part in the bizarre trend say the combination of fruit juices and hot water makes for a uniquely liberating experience.