Has a data centre in Johor flooded?

We have found no public report of a data centre building in Johor being flooded. Districts that host data centres, including Kulai, have flooded in recent monsoons, and residents have reported flash floods linked to data centre construction near housing.

How many flood hotspots does Johor have for the 2026/27 monsoon?

337, according to figures reported on 3 November 2026. By district, Muar has 65, Johor Bahru 44, Batu Pahat 41, Kluang 29, Segamat 29, Kulai 27, Tangkak 26, Mersing 22 and Pontian 19. JKR also listed 30 high-risk road locations.

Do Johor's data centre approvals consider flood risk?

Not in the criteria we found. Johor's coordinating and technical committees screen water use, with a WUE below 1.8, possible use of reclaimed water, and the electricity source. Flood is handled through ordinary drainage approval under JPS's MSMA manual.

How much data centre capacity is in Johor?

Cushman & Wakefield put Johor at 1,110 MW of operational IT capacity, 602 MW under construction and 2,486 MW planned in H1 2026, 4,198 MW in total. AXA XL, citing MIDA, says Johor hosts 78.6% of Malaysia's operational IT capacity.

When is flood season in Johor?

The northeast monsoon, which the state was preparing for from November 2026. Johor floods in recent years came in late November 2024, January 2024 and January 2025.

Johor data centre flood risk

By the FloodProtection.now team · Last reviewed 9 November 2026

Johor is the fastest-growing data centre market in Asia-Pacific, and its main clusters sit in districts that flood most monsoons: Kulai, which includes Sedenak, has 27 JPS-listed flood hotspots for 2026/27 and Johor Bahru district 44. We have found no reported case of a Johor data centre building flooding, but the surrounding roads, rivers and drainage do flood, and the state's data centre approvals test water use and power, not flood. Developers have to set their own design flood level and plan for access and fuel during the monsoon.

The build-out

Cushman & Wakefield's H1 2026 update puts Johor at 1,110 MW of operational IT capacity, 602 MW under construction and 2,486 MW planned, 4,198 MW in total. Operational capacity rose 24% against the second half of 2025 (EdgeProp). Land deals in the same period included Digital Edge in Bandar Cemerlang, DayOne in Nusajaya and KNBDC in Eco Business Park 6. AXA XL, citing MIDA, says Johor hosts 78.6% of Malaysia's operational IT capacity (InsuranceAsia News).

Much of the demand comes from across the Causeway. Singapore allocated only 200 MW in its second data centre call for application in August 2026 (EDB), and Fitch expects unmet demand to shift to Johor (Business Today). MIDA presents the Johor-Singapore Special Economic Zone as a channel for that overflow (MIDA).

Operating clusters are concentrated in Sedenak and Kulai, including Sedenak Tech Park and the YTL Green Data Centre Park (StarProperty). Thousands of megawatts are in design and construction now, which is when flood decisions are cheapest to make.

Johor's flood hotspots for 2026/27

On 3 November 2026 Johor identified 337 flood hotspots ahead of the northeast monsoon. JKR listed 30 high-risk road locations, and the state was seeking RM20 to 30 million in emergency funds (Malay Mail).

District	JPS-listed hotspots, 2026/27
Muar	65
Johor Bahru	44
Batu Pahat	41
Kluang	29
Segamat	29
Kulai	27
Tangkak	26
Mersing	22
Pontian	19

Kulai district covers Sedenak. Johor Bahru district covers Iskandar Puteri and the areas around it. A hotspot count is a district-level signal, not a verdict on any one plot, but it tells you where to look harder.

The monsoon in recent years

January 2024. Johor's flood victims reached 3,322, and Kulai was among the affected districts (Malay Mail).
November 2024. Johor was hit from 24 November as the monsoon floods spread (Malay Mail).
January 2025. Almost 1,600 people were in relief centres, and Sungai Siku at Kampung Murni Jaya, Kulai, passed danger level (Malay Mail).
2025 losses. DOSM put Johor's flood losses at RM72.1 million in 2025, up from RM59.0 million in 2024, while losses on the east coast fell (DOSM).

Rainfall is getting more intense. Observed 1-hour rainfall intensity in Peninsular Malaysia rose 17% between the 1970s and 2000 to 2007 (NAHRIM), and extreme rainfall intensity is projected to rise 16 to 20% (UTM). A design level set from past records alone is likely to be too low.

No data centre flood reported, yet

We have found no public report of a data centre building in Johor being flooded, and no report of flooding at a named operator's facility in Kulai or Sedenak in 2025 or 2026. We also found no public site-level flood hazard assessment for Sedenak Tech Park or the other campuses. One property marketing site rates Sedenak and Senai flood risk as "low" but "zone-dependent" (commercialjohor.com); that is promotional, not an assessment.

The absence of an incident is not evidence the risk is low. Most Johor capacity is new and has seen few monsoons. And the build-out itself changes drainage: residents have reported flash floods and dust linked to data centre construction near housing (NST; Malaysiakini Newslab).

The nearest Malaysian precedent is not a data centre but a network. In the December 2021 floods, more than 100 Celcom sites were hit, mainly by power outages, and flooded roads slowed restoration (SoyaCincau). Power and access are where a Johor data centre is most exposed.

What Johor's approval rules check, and what they don't

Johor now screens every data centre application through a Data Centre Development Coordinating Committee and a technical committee. The tests reported are water use, with a WUE below 1.8, possible use of reclaimed water through Johor Special Water, and the source of electricity (The Star; Malay Mail). Approvals of Tier 1 and Tier 2 data centres were reportedly halted over water use in late 2025 (W.Media).

None of the criteria we found mentions flood. Drainage still goes through the normal route: MSMA compliance is a prerequisite for approving development plans involving drainage (NST). But we found no numeric minimum platform level in Malaysia comparable to Singapore's PUB code. Passing approval tells you the site drains to the local standard. It does not tell you the substation will stay dry in a 500-year flood. That level is the developer's call, and FM Global guidance, as widely cited, and ASCE 24-24 set much higher bars than a drainage approval.

What to check at Kulai, Sedenak, Iskandar Puteri and Pasir Gudang sites

We have not found site-specific flood records for Iskandar Puteri or Pasir Gudang, so treat these as questions for a flood risk assessment, not findings.

Hotspots near the plot and the access roads. Compare the JPS hotspot list and JKR's 30 high-risk road locations against your site and every route to it, including the route diesel trucks will take.
Rivers and drains. In Kulai, check proximity to Sungai Siku and other watercourses that have passed danger level. Look at drain capacity downstream, not only on the plot.
Neighbouring construction. With several campuses being built side by side, upstream earthworks and new hard surfaces can change runoff onto your site during construction and afterwards.
Coastal and tidal exposure. For sites nearer the coast, check tidal influence on drainage outfalls. ANSI/FM 2510 does not cover coastal flood barriers (FM Approvals), so check what any barrier is certified for.
Substation and grid connection. Find out where the incoming supply and substation sit relative to the flood level, even if they are outside your fence.
Plant levels. Keep generators, fuel tanks and pumps, switchgear and chillers above the design flood level and out of basements.
Generator autonomy and fuel logistics. How many days can the site run if roads are cut during the monsoon, and who supplies fuel then?
Staff. Plan for shift handover, sheltering and supplies when roads close, as Houston operators did in 2017.
Insurance. Flood is an add-on to a fire policy in Malaysia, and business interruption cover generally needs flood added as well. See flood insurance in Malaysia and Singapore and data centre flood insurance.

Then write it into a flood emergency response plan that is ready before the monsoon starts, not during it.

Talk to us about your site. Tell us what you need protected and where. We reply within one business day with next steps for an assessment, a barrier system, a flood plan or an insurer report.

Frequently asked questions

Has a data centre in Johor flooded?: We have found no public report of a data centre building in Johor being flooded. Districts that host data centres, including Kulai, have flooded in recent monsoons, and residents have reported flash floods linked to data centre construction near housing.
How many flood hotspots does Johor have for the 2026/27 monsoon?: 337, according to figures reported on 3 November 2026. By district, Muar has 65, Johor Bahru 44, Batu Pahat 41, Kluang 29, Segamat 29, Kulai 27, Tangkak 26, Mersing 22 and Pontian 19. JKR also listed 30 high-risk road locations.
Do Johor's data centre approvals consider flood risk?: Not in the criteria we found. Johor's coordinating and technical committees screen water use, with a WUE below 1.8, possible use of reclaimed water, and the electricity source. Flood is handled through ordinary drainage approval under JPS's MSMA manual.
How much data centre capacity is in Johor?: Cushman & Wakefield put Johor at 1,110 MW of operational IT capacity, 602 MW under construction and 2,486 MW planned in H1 2026, 4,198 MW in total. AXA XL, citing MIDA, says Johor hosts 78.6% of Malaysia's operational IT capacity.
When is flood season in Johor?: The northeast monsoon, which the state was preparing for from November 2026. Johor floods in recent years came in late November 2024, January 2024 and January 2025.

About this guide. Written by the FloodProtection.now team. Each fact is checked against a primary source, such as the regulator, the national statistics office or the published engineering standard, and linked where it is used. Guides are general information; site-specific advice comes from an assessment.