If you had more centralized heating systems (like https://en.wikipedia.org/wiki/Seattle_Steam_Company or https://en.wikipedia.org/wiki/Drake_Landing_Solar_Community ) then put the extra heat in there for use in winter.

Imagine 1,000,000 Drake Landing installations per year in Canada, pre-heating with the excess electricity. In 30 years Canada would need zero fossil fuels for buildings.

which... is only 13% of their GHG emissions? Oh we're fucked. The planet's so fucked.