Extreme heat this summer is putting stress on electrical powers grids in some regions of the United States. But the bigger problem is increasing long-term impacts of global warming. Fulton Schools Associate Professor Mikhail Chester points out that many electrical grids were built decades ago and are not designed to cope with the environment we have today. That means both energy generation and distribution are likely to be hampered by the changing climate. Chester and other experts in his field say there’s an urgent need to figure out how to re-engineer the grid to be more resilient even as the climate becomes more unstable.