Anton PetrusIt can take a decade to build transmission lines, and construction fell to an all-time low in 2022.The delays make the US's aging power grid more vulnerable to extreme weather and blackouts.New federal rules could help break logjams over funding and environmental permits.America's power grid is old and stressed.Blackouts are on the rise as the climate crisis fuels more-powerful storms and as electricity demand booms from electric vehicles, data centers, and manufacturing.The main problem: It takes way too long to build towering high-voltage power lines that carry electricity across state lines and to hook up new power to the grid.