Back when I was running an Antminer in the garage (just for the hell of it) I was thinking of rigging a cooling system using swimming pool water... But was too much work.
Depends on the size of the rig. 10kW would probably heat a house or warm a swimming pool. It would certainly make sense if mining farms were encouraged to find uses for the waste heat rather than just pumping it into the atmosphere (or even worse using aircon to cool the rigs) eg. heating homes, commercial premises or a municipal swimming pool.
Even before Elon Musk's tweet, bitcoin mining was consuming this much electricity. But after that, it looks like more people have come to know about it and will keep talking about it until they find a solution.
If you have a swimming pool measuring 10 meters by 5 meters and 2 meters deep, and you have to heat it up from 50°F to 82.4°F, you need 2,512.20 KWH of electricity. heated in 24 hours: 2,512.20 KWH per day heated in 48 hours: 1,256.10 KWH per day heated in 72 hours: 837.40 KWH per day heated in 96 hours: 628.05 KWH per day To maintain the temperature, assuming temp goes down at night from 82.4 to 80.6, you need every day 139.57 KWH. This means 5.81 KW each hour 24/7.