I put the quotes there because at least in Europe, during peak summer time and now during the winter, we cannot reliably use the dams because of the lack of wat

I put the quotes there because at least in Europe, during peak summer time and now during the winter, we cannot reliably use the dams because of the lack of water. The dams are not anymore as "reliable" as they used to be, not because of the construction, but because of the global evolution of the environment.