Certainly with respect to heating buildings, there are technologies ready to go.
With respect to grain drying, it really depends on how much drying you need to do. If the grain is simply tough, we already have options. There are many passive options that people should be using. These are grain air tubes that go in grain silos. Natural aeration with supplemental passive solar heating is a good option, I think. It's actually what I tried to use in the harvest from hell of 2019.
It's when you have damp grain and when you have these very extreme conditions that you need a high-energy supplementary heat source to dry grain and dry it quickly. That might be a little bit slower to come. It really needs decarbonization of the grid and assistance for farmers to increase the power supplies to their bin yards.