You turn on the shower, and it's cold. Not lukewarm, cold. It's July, nothing is broken, and half your building is in the same situation. Welcome to the Prague summer hot water outage, an annual event that catches many newcomers off guard at least once.
The first instinct is to assume the boiler died and start looking for an emergency plumber. Don't. In most cases this is a planned shutdown of the shared district-heating system for maintenance, it's legal, it's temporary, and you can find the exact day your hot water comes back. This guide explains why it happens, what your rights are, and how to tell a scheduled outage apart from a genuine fault.
Key Takeaways
- Roughly one third of Czech dwellings get heat and hot water from centralized district heating rather than an in-flat boiler (Census 2021, Czech Statistical Office); in Prague, Pražská teplárenská alone supplies more than 250,000 households
- Summer shutdowns are capped at 14 days by law and must be announced at least 10 days in advance (Decree 194/2007 Sb.); most Prague outages last only 3 to 7 days
- Check your exact dates on the Pražská teplárenská (PTAS) outage map; dates vary street by street
- If nothing was announced, it's winter, or only your flat is affected, treat it as a fault: call your building manager first, and a plumber for anything inside your own flat
Why does Prague shut off hot water every summer?
Roughly one third of Czech dwellings are connected to district heating rather than an in-flat boiler (Census 2021, Czech Statistical Office), and in Prague, Pražská teplárenská alone supplies heat and hot water to more than 250,000 households (Pražská teplárenská, ptas.cz). That shared network of pipes needs servicing, and summer is the only window to drain, inspect, and repair it without leaving anyone cold in winter.
So there's no boiler in your bathroom to blame. Your hot water arrives, already heated, through pipes shared by the whole building or even the whole block. When the supplier takes that network down for maintenance, everyone connected to it loses hot water at the same time. It isn't your landlord cutting corners. It's infrastructure doing its once-a-year overhaul.
In Prague the main supplier is Pražská teplárenská (PTAS), which serves most district-heated buildings, alongside Veolia Energie Praha in some areas. These companies coordinate the summer maintenance calendar, which is why outages tend to cluster in early July and late August.
How long can the outage legally last?
Planned summer outages are capped at 14 days and must be announced to every affected household at least 10 days in advance (Decree 194/2007 Sb.). Most Prague shutdowns run far shorter, typically three to seven days. Anything longer than 14 days, or with no notice at all, is not a normal planned outage.
The same decree sets out what you're owed the rest of the year. Hot water has to reach your tap at 45 to 60°C, year-round, and be available at least from 06:00 to 22:00 every day. Planned repairs are only allowed outside the heating season, which is exactly why they land in summer.
Knowing these numbers is genuinely useful in a dispute. If your building announces an outage with three days' notice, or it drags past two weeks, the rules are on your side.
How do I find the shutdown date for my address?
Your supplier publishes the schedule, and in Prague that's usually Pražská teplárenská, whose outage map lets you search by address and see the planned dates. Veolia Energie Praha and ČEZ publish their own schedules too, and your building notice board (or your správce) will post the local dates as well.
The process is quick. Identify which company supplies your building, search your address on their outage map, and note the return date. Then check with a neighbour, because dates genuinely vary street by street, and the block next door may go dark on completely different days.
There's a consistent pattern worth knowing. Outages tend to cluster in two windows, roughly early July and late August, and a building can go offline in one window while the block next door waits for the other. The exact dates change every year and vary street by street, so the only reliable source for your address is the supplier's own outage map. Don't rely on a date you saw for a neighbouring district, confirm your own.
Scheduled outage or actual breakdown? How to tell
Here's the distinction that saves you an unnecessary call-out fee: a scheduled outage was announced at least 10 days ahead, happens in summer, and hits the whole building at once. A fault is the opposite, no notice, wrong season, or only your flat affected. In January 2026, a genuine fault left around 11,000 Prague 4 households without heat and hot water (Prague Daily News), and that is what a real emergency looks like.
Run your situation through this quick check before you call anyone.
Plenty of newcomers nearly book an emergency plumber for what turns out to be a shutdown the whole street already knew about. One knock on a neighbour's door usually settles it. That's the cheapest diagnostic tool you have.
Who do I call, and in what order?
For a scheduled outage, you call no one, it comes back on the posted date. For a genuine fault, the order matters: contact your building manager (správce or SVJ) first, because they report network problems to the supplier on the whole building's behalf. For anything inside your own flat, a leaking mixer tap, your own water heater, a burst flexi hose, you need a plumber, not the heating company.
That last case is where the language barrier usually bites, most Prague plumbers work in Czech. On a platform like Tool Connect you don't need any Czech at all: you describe the problem in English, the provider receives it in Czech, and their reply comes back to you in English. The translation runs in both directions, so neither side needs the other's language. For help vetting whoever turns up, our guide on how to find a reliable handyman in Prague covers what to check before you book.
How do I survive a few days without hot water?
Outages are short, and a little planning removes almost all of the pain. Since most Prague shutdowns last only three to seven days, you rarely need more than a few workarounds to bridge the gap comfortably.
A few things that help:
- Boil and mix. A kettle or a big pot of hot water is enough for a quick wash at the sink.
- Shower elsewhere. Most gyms and public pools have showers, and a work shower before or after the commute solves the weekday problem.
- Shift your timing. If the outage is partial, hot water sometimes returns overnight; ask neighbours what they've noticed.
- Switch the tap to cold. Drawing water through the hot circuit during an outage can still register on your meter, so keep the mixer on the cold side.
If the outage overlaps with something you'd rather fix yourself, our piece on what's safe to DIY in a Prague apartment is worth a look before you reach for a wrench.
Find a plumber fast when it's a real fault
When the problem is inside your own flat and it can't wait for the scheduled water to return, you need someone reliable without spending an evening on Czech-language phone calls. That's exactly what Tool Connect was built for.
Describe the problem in English, browse provider profiles and reviews, and message someone directly. Profiles and conversations are translated automatically in both directions, so the provider works in Czech while you read everything in English. No Czech required, and no guessing whether the person on the other end speaks your language.
Start at tool-connect.com.
FAQ
Is my landlord allowed to turn off hot water without warning?
No. Planned outages must be announced at least 10 days in advance and cannot exceed 14 days (Decree 194/2007 Sb.). Outside an outage, hot water has to be available from 06:00 to 22:00 daily at 45 to 60°C. A sudden, unannounced cut is a fault, not a legal shutdown.
How long do Prague summer hot water outages usually last?
Most last three to seven days, and the legal maximum for planned maintenance is 14 days (Decree 194/2007 Sb.). Dates vary street by street, so your building and the one next door may be scheduled for completely different weeks in July or August.
What temperature should my hot water be?
By law, hot water must reach your tap at 45 to 60°C year-round, with only brief dips allowed during peak demand (Decree 194/2007 Sb.). If your water is persistently lukewarm outside an outage, that's grounds to raise it with your building manager or supplier.
Do I have to pay an emergency plumber during a scheduled outage?
No, and you shouldn't need one. If the whole building lost hot water after a proper announcement, it's the district-heating maintenance and it returns on the posted date. Confirm it's a genuine fault, inside your own flat, before paying any call-out fee.
Where do I find the official outage schedule?
Your supplier publishes it. In Prague that's usually the Pražská teplárenská address-searchable map, with Veolia Energie Praha and ČEZ covering other areas. Your building notice board and your správce will also post the local dates. Always confirm your own street.
Sources and Data
| Data point | Value | Source |
|---|---|---|
| Czech dwellings on district heating | Roughly one third | Census 2021, Czech Statistical Office |
| Households supplied by Pražská teplárenská in Prague | More than 250,000 | Pražská teplárenská (ptas.cz) |
| Maximum planned outage length | 14 days | Decree 194/2007 Sb. |
| Minimum advance notice | 10 days | Decree 194/2007 Sb. |
| Required hot water temperature | 45 to 60°C at the tap | Decree 194/2007 Sb. |
| Daily availability hours | 06:00 to 22:00 | Decree 194/2007 Sb. |
| Typical Prague outage length | 3 to 7 days | expats.cz and PTAS schedules, 2026 |
| Prague 4 households hit by Jan 2026 fault | Around 11,000 | Prague Daily News, January 2026 |