The answer to 'how to fix emergency plumbing' is to first identify and stop the source of the plumbing emergency. This may involve turning off the main water supply, locating and fixing a leak, or unclogging a drain. Safety is paramount, so be sure to shut off electricity or gas if necessary before attempting any repairs.
For minor issues like a clogged sink or toilet, you can often clear the blockage yourself using a plunger or a drain snake. However, for more complex problems like burst pipes, sewer backups, or malfunctioning water heaters, it's best to call a professional plumber as soon as possible to prevent further damage and ensure the problem is resolved safely and effectively.