The electric power sector is at the forefront of the energy transition. Renewables are rapidly replacing fossil fuel power plants while electric vehicles (EVs), heat pumps, industrial electrification and other emerging technologies are transforming the way energy is distributed and consumed. What are the key challenges as governments and companies work to modernize the grid? How can we maintain reliability in the face of more intermittent resources and more extreme weather? What are the building blocks of smarter and stronger grids?