I belong to Point Grey in Vancouver, BC where we can usually play all year round, so long as one does not mind soft and wet turf. Our club approved a course improvement program of green surrounds, bunkering, mounding, tree removal and drainage work and much of that work is underway under the direction of Graham Cooke and Wayne Carlton, both Canadian architects. Some holes are complete and looking good and the program will continue for the next few years.
Much of the course is below sea level, protected by dikes along the north arm of the Fraser River, close to where the river discharges into he Gulf of Georgia. Shaughnessy is just over a mile away to the west but sits up on an embankment adjacent to the river. Drainage has always been a concern and we have two very large pumps discharging from the drainage system into the river. This year, there were some unusually high tides which made "firm and fast", which are possible in the summer months, very difficult to achieve. Whether the high tides are a reality of life during global warming is something we will have to see. Our buckets of rain have some short term affect but the locale of the course on the river delta makes drainage a constant issue.
In short, we are always undertaking drainage work in the winter, maintaining the existing system and adding more.
That's about it.