It depends on the robustness of the water plant feeding the hydrant. I can speak in generics, not the City specifically...
You're not typically going to connect more than one truck up to a single hydrant. The multiple ports are primarily used to afford you different amounts of waterflow, not to allow multiple trucks to use one hydrant. A modern fire pumper will move between 1250 and 4500 gallons of water a minute - the top end of that is often more than a water system can supply from one outlet. Many years ago I remember a local fire department doing an advanced pumping test where they brought in a heavy-duty pumper and ran it near its maximum, and it was strong enough to suck all the silt up off the bottom of the water mains, which made everybody's kitchen faucets and showers and etc run 'brown' for a day or so. That's another thing - hydrant water is almost always tied into the residential/commercial service supply, so heavy use in one will impact the other. A lot of places if there is a big fire going on will either automatically or manually increase pumping capacity at the water treatment/delivery plant to account for this.
In large fires you're going to see second, third, fourth, etc., pumpers go around the community looking for the next available hydrant. Sometimes you might have to go 2 or 3 blocks to tag one, especially if you need to find one on a different water main than the one the first crew is using (so that it's not drawing water from the same source as the first).
In some cases, especially in rural areas, you set up one pumper at a hydrant (or a "static water source" meaning a lake, pond, pool, etc) and then run impressive lengths of hose a
far distance to where you need the water. One such example on video is these guys in Georgia many years ago who ran over a mile of hose from a pumping point to another location, primarily as a test of their abilities. All I know is, I wouldn't want to be involved in re-decking the truck.