Plumbing in Oklahoma City lives in slabs and garages. The ranch on the fringe leaks under the floor and shows it as a warm streak or a meter that creeps while the house is quiet. Water heaters sit in garages and fail onto the slab. Older houses nearer the center may have a basement or a crawl instead, and the leak will look like a ceiling stain.
Say leak, drain, or water heater in the first breath, and say where the heater is. Gas odor means you are outside making the call. A pan full of rust water means say so. A rumble and no hot water means say so. If you already cut the main, say that before the long story. Many mains in these garages sit within a few steps of the heater, and some of those valves have not turned in years. If yours will not move, do not force it into a bigger leak. Report it.
Drains follow clay and roots. A single slow lavatory is not a sewer. A tub and a nearby toilet that gulp together might be. Wet ground that smells bad between the house and the alley is worth a straight sentence. So is a floor drain in a garage that bubbled during a hard rain. Wind did not do that. A line did. Sprinkler water can fake a plumbing leak, so say whether a zone was running or a head was gushing against the brick.
Cold nights still split hose bibs, especially on the north and west where the wind can push the freeze. Irrigation needs to be shut down and backed off before that night, and if you do not know the shutoff, the call is a good time to admit it. Burst poly in a bed looks like a slab leak the next morning. The difference is whether the meter moves when the sprinkler valve is closed. If you can check that safely, do it, and report the result.
The next front will look for the weak bib and the weak joint. Call with the part of town and where the water is showing up, floor, garage, ceiling, or yard. One honest location beats a tour of every faucet. Call the number on this page.