Major fire at Viennese waste disposal company: A23 remains closed after fire in Donaustadt

Due to the rapid spread of the fire and the intense smoke development, which was visible from many parts of Vienna, the incident command declared "Alarmstufe 4" (Alarm Level 4). Up to 120 firefighters with 31 vehicles were deployed simultaneously to prevent the flames from spreading to neighboring buildings. Using multiple hose lines and water cannons, the crews tackled the meter-high flames, a task made even more difficult by the high fire load and the size of the hall.

Large-scale operation at Alarm Level 4

The Vienna Professional Fire Department worked hand in hand with the Vienna Professional Rescue Service, the Vienna State Police Directorate, ASFINAG, and the Austrian Federal Railways (ÖBB) during the operation. While the main forces were tied up in Donaustadt, the two city fire department associations and the disaster relief service of the Vienna State Fire Department Association took over basic protection coverage for the Viennese population and at the same time responded to several concurrent emergencies in the city.

By around 9:00 p.m., the crews managed to bring the fire under control. However, full extinguishing work and extensive cleanup operations dragged on into the early morning hours. On Saturday, firefighters were still busy extinguishing embers and carrying out securing measures on the severely damaged hall.

Praise from the city councillor responsible for the fire department

No one was injured in the fire. No people were in the affected hall at the time the blaze broke out. Vienna's city councillor responsible for the fire department, Barbara Novak (SPÖ), personally inspected the situation on Saturday and thanked the crews for their hours-long operation under challenging conditions.

A structural engineer is examining the stability of the severely damaged storage hall as well as possible effects on the immediately adjacent highway infrastructure. Only after this investigation is completed can a decision be made on when the A23 Südosttangente between the Kaisermühlen interchange and the Stadlau Tunnel can be reopened. Until then, both directions remain closed.

Closure of the A23 Südosttangente

The ÖAMTC originally expected the closure to remain in place at least until Saturday evening. Already by Saturday morning, there were significant delays on the nearby alternate routes Erzherzog-Karl-Straße and Stadlauer Straße. The ÖAMTC advised drivers to take a wide detour via the A22.

During the closure, traffic was diverted via the surrounding road network. Since the closed section is one of the most heavily used stretches of the Viennese motorway network, the impact on commuter traffic was enormous. "Wir empfehlen hier bei Möglichkeit großräumig, wie etwa über die A22, auszuweichen", said a spokesperson.

Investigation into the cause is in its early stages

Novak stressed at the scene: "Oberstes Ziel bleibt der Schutz aller Beteiligten und die Sicherheit aller Einsatzkräfte". She expressed her explicit thanks to the firefighters and emphasized that they "unter herausfordernden Bedingungen seit Stunden hervorragende Arbeit leisten".

According to the Vienna Fire Department, the cause of the fire is the subject of ongoing investigations. No indications of criminally relevant arson or of a technical defect as the trigger have been made public so far.

The A23 Südosttangente is considered one of the most important east-west connections in the federal capital. It runs, among other places, past the Donau-Auen National Park and connects the districts along the Danube. The full closure in both directions is therefore a severe impact on private transport in Vienna.

The operation also highlighted the mutual support within the Viennese fire department structure. While the professional fire department fought the major blaze, the volunteer fire departments and the disaster relief service maintained the city's standard coverage and at the same time responded to several concurrent emergencies.

Viennese transport infrastructure under pressure

Observers noted that the dense column of smoke on Friday evening was visible from afar and even unsettled residents in more distant districts. The Vienna Fire Department therefore repeatedly called through official channels for windows and doors to be kept closed.

The incident commander of the professional fire department stated the top priority as: "Ein Übergreifen der Flammen auf angrenzende Bereiche verhindern." This priority guided the entire deployment of forces and was also taken into account when setting up the hose lines.

According to Ö3's traffic service, the A23 was reopened to traffic in the night leading into Sunday after the essential securing work was completed. Prior to that, the crews were still occupied for hours after the actual fire with mop-up operations and securing the hall.

Overall, the incident highlights the vulnerability of Viennese transport infrastructure to local large-scale emergency events: just a few hundred meters between the storage hall and the motorway were enough to completely shut down the A23 for around one and a half days. The responsible authorities announced that the cause of the fire will be investigated without any gaps.