There are places you can fish even in the dead of winter where the water temperature is far warmer and the crappie considerably more aggressive than you’d ever dream possible. These crappie hotspots are impacted by nearby steam-generating power plants, which warm the water to create a veritable sauna for crappie and baitfish. Imagine casting into water that’s in the low 60-degree range even though the air temperature is barely bumping 30 and the lake temperature a few miles away is in the mid-40s. To help you load the boat near a power plant in your area this winter, some of the best crappie guides in the land offer their inside tips on fishing these so-called crappie saunas.