In 2010, a heat wave in Russia led to over 1,000 deaths, the majority of which died from drowning while swimming drunk!

Russians were panicked by the heat wave and flocked to nearby bodies of water for some relief from the heat. Hundreds of people drowned each week, because they were drinking while swimming. 

The people ended up drowning. Over 1,200 people died in the month of June alone. Some of which were children who were unsupervised while the adults drank. The Russians flocking the lakes and rivers brought vodka and beer for entertainment and ended up drowning. It’s said to be a very common pastime for Russians. They drink, then swim, then drink some more. The heat wave caused extensive crop damage and led 16 regions to declare a state of emergency.

(Source)