2 Shabboses ago was Shabbos Nachamu. Since Tisha B’av was on Thursday, people were allowed to start doing laundry Friday morning instead of having to wait until after chatzos. I do not want to get into those halachos now as it will hopefully be irrelevant by the time next Tisha B’av comes around.
This reminded me of an issue that I noticed and found a possible solution for. Many people will have a problem in their house where the hot water will run out after a bunch of people take showers. This problem usually is worse on Erev Shabbos when every member of the household plus guests need to take a shower during the same period of time so the hot water doesn’t have time to reheat. I also noticed that many people will do laundry on Erev Shabbos. I am not sure if the washing machines and showers get their hot water from the same source but I assume that in many houses they do and therefore you can possibly alleviate the hot water problem by doing the laundry on Thursday or as early as possible Friday morning.
…or run the washing machine on a cold wash / cold rinse cycle.