Not applicable to the Nordics. Here in Finland the heat is mostly used for district heating, cooled in closed circulation, or cooled (alas wasted) with see water. According to official information, big data centers used max 4000 m³ of water in 2024 apiece; this is only < 1/10 compared to mid-sized US datacenter, https://yle.fi/a/74-20175822 But the Southern Europe is sure another story. @koen_hufkens