Risk 9 of 10 · Water
Water Scarcity and Water Crises
Water crises driven by droughts, structural scarcity, failing water infrastructure and poor management, impacting growth, agriculture, public health and stability.
Definition
Water crises driven by droughts, structural scarcity, failing water infrastructure and poor management, impacting growth, agriculture, public health and stability.
Opportunity
Improve water governance, invest in infrastructure and alternative water sources, and promote efficient usage practices.
Why this risk matters
- Water insecurity threatens public health, food production, industrial activity and community stability.
- It turns climate stress, infrastructure weakness and poor governance into immediate operational and social crises.
- Repeated water failures can become a binding constraint on growth, wellbeing and legitimacy.
Storyline
Southern Africa faces a mounting systemic risk of water scarcity and recurrent water crises as physical limits on water resources converge with decades of under‑investment, weak governance and infrastructure failure in the water value chain. Structural water stress is intensifying due to declining storage capacity in ageing, silted dams, degraded catchments, and growing climate variability, while high levels of non‑revenue water from leaks, illegal connections, and poor metering mean that a significant share of available water never reaches households, farms, or industry. Pollution of rivers, dams and aquifers by untreated sewage, industrial effluents and agricultural runoff further reduces usable supplies and raises treatment costs.
These weaknesses are already evident in frequent and prolonged water outages and low‑pressure events in towns, cities and rural communities, with households facing unreliable, and at times, unsafe water and sanitation services. Agriculture experiences yield losses, production shifts and heightened food‑price volatility as drought, failing irrigation systems and competition for scarce water intensify. Businesses in water‑dependent sectors confront production losses, business interruption and rising costs as they invest in self‑provisioning and contingency measures, influencing investment and location decisions.
At the same time, chronic failures and sewage spills fuel community protests and local conflicts over access, erode trust in municipalities and water utilities, and reinforce perceptions of state incapacity. Without accelerated catchment rehabilitation, efficiency and demand management, infrastructure refurbishment and stronger regulation of utilities and pollution, recurring water crises risk becoming a binding constraint on growth, public health and social stability.
At a glance: Why this risk matters
Water insecurity threatens public health, food production, industrial activity and community stability.
It turns climate stress, infrastructure weakness and poor governance into immediate operational and social crises.
Repeated water failures can become a binding constraint on growth, wellbeing and legitimacy.
Scenario outlook
| Time horizon | Best Case | Medium Case | Worst Case |
|---|---|---|---|
| Short-term (1-2 years) | Emergency water interventions succeed, infrastructure repairs are completed, demand management is effective, pollution is controlled, and water security improves. | Localised water crises, inconsistent supply, slow infrastructure progress, ongoing management failures, and rationing in some areas. | Major city water system collapse (Day Zero), health crisis, economic shutdown, mass displacement, and agricultural devastation. |
| Medium-term (3-5 years) | Water security achieved, modern infrastructure, integrated water resource management, desalination and reuse, operational, drought resilience. | Chronic water stress, ageing infrastructure, inadequate investment, periodic crises, uneven access, and economic constraint. | Cascading water failures, public health disasters, agricultural collapse, industrial shutdown, mass migration, state failure. |
| Long-term (6-10 years) | Water-secure nation, world-class infrastructure, sustainable management, regional water cooperation, climate adapted systems. | Persistent water vulnerability, insufficient investment, climate pressures mounting, competitive disadvantage, and ongoing crises. | Permanent water catastrophe, uninhabitable regions, economic collapse, humanitarian emergency, climate refugee crisis, failed state. |
p52— see this page in the report Best / Medium / Worst case across short, medium and long-term horizons.
Interconnections
From the Part 1.4 influence matrix. Strength as printed: H high · M medium · L low.
Risks this risk influences
- Governance — High influence
- Infrastructure — High influence
- Climate — High influence
- Economic — Medium influence
- Inequality — Medium influence
- Energy — Medium influence
- Political — Low influence
- Crime — Low influence
- Cyber — Low influence
Risks influencing this risk
Sector & regional exposure
Chapters whose printed Top 10 impact grid ranks this risk. AVE RANK 1 = highest impact.
Sectors
Compiled from each chapter’s “IRMSA Top 10 impact” grid (Parts 2–3); open a chapter page to see its source.
International view
Water scarcity and water crises
Water scarcity is emerging as a strategic risk in more sectors and regions, particularly where climate variability intensifies pressure on agriculture, manufacturing and urban systems. At the same time, energy security remains a concern worldwide, with rising demand, transition pressures and extreme weather driving investment in resilience, diversification and protection of critical energy infrastructure from both cyber and physical attack