No hot water (at all) on upper floors
We brought in a couple heaters and set them to 26 degrees Celsius. We also kept faucets dripping "hot" (actually just cold) water. We additionally opened the water main access door and blew hot air into the walls, as well as heating up all our bathrooms with the vent fans on. This all happened for over 72 hours. A few hours ago, our hot water has been restored.