Housing stock and era
The Art Deco core of South Beach dates to the 1920s-1940s; Mid-Beach and North Beach followed in the 1950s-60s.
Answered any hour, including in Miami Beach
Miami Beach, Miami-Dade County, sits about 24 kilometers from the Hollywood base -- still inside the same South Florida dispatch map run out of Hollywood, for failures that cannot sit until business hours.
Is there a 24/7 emergency plumber in Miami Beach?
Yes, coverage extends out to Miami Beach from the Hollywood base, roughly 24 kilometers out, on the same 24/7 line as Hollywood. Mostly condo and hotel-conversion buildings, with single-family streets on the Venetian Islands.
The part that is specific to Miami Beach: The Art Deco core of South Beach dates to the 1920s-1940s; Mid-Beach and North Beach followed in the 1950s-60s. That said, dispatch still answers Miami Beach calls at any hour and sends a plumber rather than booking next-day.
As for who owns the pipe in the street, the city’s own utility runs water and sewer; king-tide flooding is documented enough that the city funds pump-station work to manage it, which matters more in Miami Beach than a generic answer would suggest. Permits themselves route through the City of Miami Beach building department, with additional historic-preservation review inside the Art Deco and MiMo districts -- worth knowing before scheduling anything in Miami Beach.

Local context
A short, factual read on Miami Beach -- nothing here is tourist trivia.
The Art Deco core of South Beach dates to the 1920s-1940s; Mid-Beach and North Beach followed in the 1950s-60s.
Mostly condo and hotel-conversion buildings, with single-family streets on the Venetian Islands.
The city’s own utility runs water and sewer; king-tide flooding is documented enough that the city funds pump-station work to manage it.
Where in the city
Real names in Miami Beach, each tied to something specific about the plumbing there.
the pre-1940s Art Deco core, where a building this old is more likely to still carry original cast iron or galvanized risers than newer construction elsewhere on the island.
built mostly in the 1950s and 1960s hotel boom, with plumbing infrastructure a couple of decades newer than South Beach on average.
a mix of 1930s-40s Art Deco pockets and later mid-century apartment buildings, spanning several different plumbing eras block by block.
Who to call, officially
Before work starts in Miami Beach: the permitting authority, spelled out rather than guessed.
Questions
Yes. The line is answered any hour, including weekends and holidays, the same as everywhere else in the coverage area.
Not usually -- a running toilet wastes water but rarely floods anything. In Miami Beach that gets booked as a routine visit, not a dispatch.
The City of Miami Beach building department, with additional historic-preservation review inside the Art Deco and MiMo districts handles plumbing permits for work performed inside Miami Beach.
That is exactly what the 24/7 line exists for. Shut the water off at the main if you can reach it, then call.
Yes -- South Beach gets the same coverage as the rest of Miami Beach, on the same 24/7 line.
Nearby coverage
Coverage from Miami Beach does not stop at the city line.
Talk to dispatch
Call and a professional plumber is routed to your Miami Beach address, any hour of the day or night.
Same coverage map, same dispatch, same day.