Flood Protection in Indonesia: Practical Steps to Safeguard Your Assets from Water Damage
Floods have struck Jakarta once again. Since January 22, 2026, heavy rainfall has inundated up to 143 neighborhoods (RT) and 16 road sections across the capital, with water levels reaching 150 cm in areas like Rawa Buaya, West Jakarta.¹ Hundreds of residents were forced to evacuate, economic activities disrupted, and mobility paralyzed in several districts.
This is neither the first flood event this year—nor likely the last. According to the National Disaster Management Agency (BNPB), approximately 50% of urban areas in Indonesia are at risk of flooding every year.² Throughout 2025 alone, 441 flood incidents were recorded—making it the most dominant disaster type nationwide.³ The question is no longer "will flooding occur," but rather "are we prepared when it does?"
Jakarta's Changing Flood Patterns: No Longer Just Overflow from Bogor
Researcher Yus Budiyono from the National Research and Innovation Agency (BRIN) has documented significant changes in Jakarta's flood patterns.⁴ While floods were historically dominated by river overflow or water surges from upstream areas like Bogor, extreme rainfall falling directly on urban areas has now become the primary cause.
The city's drainage system, designed to handle maximum rainfall of 120 mm per day, is overwhelmed when intensity frequently exceeds this capacity. January 2026 flood data clearly demonstrates this pattern: the majority of inundation was caused by "high rainfall intensity" combined with overflow from rivers such as Angke and Pesanggrahan.⁵
In response, Jakarta Governor Pramono Anung announced plans to normalize three major rivers—Ciliwung, Krukut, and Cakung Lama—which have experienced significant narrowing. "Rivers like Cakung Lama should be 15 to 20 meters wide, but now they're down to just 2 meters," Pramono stated.⁶ However, large-scale infrastructure solutions require time—while the rainy season continues.
Lessons from the March 2025 Major Flood: Rp1.7 Trillion in Losses
The massive flooding that hit Greater Jakarta (Jabodetabek) in March 2025 provides a stark picture of the economic impact. According to BNPB, total damage and losses reached Rp1.69 trillion—with the housing sector bearing the largest burden at Rp1.34 trillion.⁷
The breakdown includes: infrastructure sector at Rp155.98 billion (physical damage and transportation disruption), economic sector at Rp144.47 billion (damage and reduced business activity), and social sector at Rp36.79 billion (disruption to health and education services).⁸ Bekasi Regency recorded the highest damage with total impact reaching Rp680 billion, while Bekasi City suffered the largest losses at Rp878.6 billion.
More than 90,000 people were displaced, and hundreds of thousands of homes were submerged up to 3 meters in some locations. These figures are not mere statistics—they serve as reminders that flood protection is not a luxury, but a necessity.
Critical Entry Points: How Does Water Enter Buildings?
Before discussing solutions, it's essential to understand how floodwater breaches building defenses. Based on three decades of field experience, here are the most vulnerable points:
Main doors and side entrances: Gaps beneath doors become the first pathway for water entry, especially when floor levels are not higher than street level.
Drainage holes and sewage outlets: When drainage systems cannot handle water volume, flow reverses and enters buildings through these openings.
Low ventilation and wall gaps: These areas are often overlooked, yet water depths of just 10-15 cm can seep through such gaps.
Loading docks and vehicle access areas: For commercial and industrial facilities, these areas are particularly vulnerable as they typically sit at lower levels.
Protection Strategies: From Prevention to Emergency Response
Flood protection is not about a single solution, but rather a combination of complementary measures. As the BRIN researcher noted: "We cannot rely solely on mitigation to keep water away; we must learn to coexist with it, especially during the rainy season."⁹
Permanent Measures: Long-Term Investment
Raising floor levels, installing automatic water pumps, or building mini-polder systems represent ideal long-term solutions. However, these measures require significant investment and implementation time—not always practical when the rainy season is already upon us.
Semi-Permanent Measures: Periodic Preparation
Regularly cleaning drainage channels, inspecting roof and gutter conditions, and ensuring submersible pumps function optimally are steps that should be taken before the rainy season. BMKG predicts peak rainfall across most of Indonesia will continue through early 2026, making this a critical time for evaluation.
Emergency Response: Protection During Crisis
This is often overlooked: what do you do when heavy rain is already falling and floodwater is approaching? Traditionally, communities rely on sandbags. While effective at blocking water, this method has significant limitations: heavy, labor-intensive to deploy, leaves muddy residue after floods recede, and only blocks water—it doesn't absorb it.
Advances in material technology now offer more efficient alternatives. Products based on Super Absorbent Polymer (SAP) can absorb up to 20 times their weight in water, remain lightweight when dry for easy storage, and leave no muddy residue. Unlike sandbags that only block, SAP materials actively absorb floodwater—reducing the volume of water that could damage assets inside.
What's Most Important to Protect?
When discussing flood losses, physical building damage is often not the most painful. BNPB data shows that the largest losses actually come from damage to assets inside buildings. Consider:
Critical documents: Land certificates, company legal documents, financial records—once waterlogged, the loss is immeasurable.
Electrical systems: Submerged electrical panels mean not only equipment damage but also short-circuit and fire risks.
Inventory and stock: For business owners, losing stock means losing revenue and customer trust.
Electronic equipment and machinery: Data servers, production machines, medical equipment—damage to a single unit can halt business operations.
Location-Based Preparedness
Flood protection needs vary depending on location characteristics:
Homes and Residences: Prioritize protection at main entrances, kitchen areas (electrical and gas installations), and document storage rooms. For homes with elderly or special needs individuals, consider adequate evacuation plans.
Shops and Retail Stores: Display areas and cashier stations are typically at the front, most vulnerable to initial flooding. Ensure valuable stock is stored on higher shelves as a preventive measure.
Office Buildings: Basements and ground floors are primary focus areas. Server rooms, archives, and electrical panels on lower floors require special attention.
Factories and Industrial Areas: Focus on critical points such as raw material warehouses, production rooms with sensitive machinery, and finished goods storage areas.
Schools and Public Facilities: Laboratories, libraries, and archive rooms contain invaluable assets. Preparedness must also consider student and staff safety in emergency situations.
Warehouses and Logistics Centers: Open loading docks are primary vulnerability points. Effective protection in these areas can prevent significant losses to ready-to-ship inventory.
Criteria for Choosing Flood Protection Solutions
Not all flood protection solutions are created equal. Here are criteria to consider:
Ease of storage: Solutions that are lightweight and compact when dry make year-round storage easier, ready for use when needed.
Deployment speed: In emergencies, every minute counts. Choose solutions that can be installed quickly, even by one person.
Effectiveness: Does the solution only block water or also absorb it? A combination of both provides more optimal protection.
Environmental impact: Consider the environmental footprint—whether materials are biodegradable or require special handling after use.
Total cost: Calculate not only purchase price but also storage, installation, and post-use cleanup costs.
Act Before the Water Arrives
The ongoing January 2026 Jakarta floods, combined with lessons from the March 2025 major flood with Rp1.7 trillion in losses, demonstrate that preparedness is no longer optional—it's essential. For homeowners, business operators, and facility managers, the critical question that must be answered: if heavy rain falls tonight and floodwater begins to creep in, do we already have clear action steps?
Protection doesn't have to be expensive or complicated. Start with evaluating vulnerable points at your location, preparing emergency response equipment, and ensuring all family members or employees understand evacuation procedures. Small steps taken today can prevent major losses tomorrow.
SECOM Indonesia, with over 30 years of experience in integrated security systems, understands that asset protection extends beyond human threats to include natural disasters. We provide consultations to help you identify the right protection needs—including innovative solutions like the Anti Flood Kit, which uses SAP technology for practical and efficient light flood protection.
Want to learn more about protecting your assets from various threats? Contact the SECOM Indonesia team for security consultation tailored to your location's needs.
REFERENCES
¹ BPBD DKI Jakarta. (January 23, 2026). "Update Info Terkini Genangan 23 Januari 2026." bpbd.jakarta.go.id
² Badan Nasional Penanggulangan Bencana Indonesia. (2025). Indonesia Disaster Statistics.
³ GoodStats. (2025). "Catatan Bencana Alam di Indonesia pada 2025, Banjir Mendominasi." goodstats.id
⁴ Kompas.com. (January 25, 2026). "Pola Banjir Jakarta Berubah: Dulu karena Luapan, Kini akibat Hujan Ekstrem." megapolitan.kompas.com
⁵ BPBD DKI Jakarta. (January 22, 2026). "Update Info Terkini Genangan 22 Januari 2026." bpbd.jakarta.go.id
⁶ Republika Online. (January 26, 2026). "Tiga Sungai di Jakarta Bakal Dinormalisasi Tahun Ini." news.republika.co.id
⁷ BNPB. (March 28, 2025). "Dampak Banjir di Jabodetabek, Kerugian Ekonomi dan Upaya Pemulihan." bnpb.go.id
⁸ Detik.com. (March 28, 2025). "Kerugian Banjir Jabodetabek Rp 1,69 T, Bekasi Raya Paling Terdampak." news.detik.com
⁹ Kompas.com. (January 25, 2026). Interview with Yus Budiyono, BRIN Researcher.