What Happened: A Record-Breaking Event
On 15-16 April 2024, an exceptionally intense low-pressure system generated rainfall across the UAE and eastern Oman that shattered historical records. Dubai International Airport recorded approximately 254 mm of rainfall in less than 24 hours — roughly equivalent to the UAE's entire average annual rainfall delivered in a single day. Al Ain, near the Omani border, recorded even higher totals exceeding 300 mm.
The consequences were severe and widespread:
- Significant loss of life, with fatalities reported in both the UAE and Oman
- Hamad International Airport and Dubai International Airport both experienced significant disruption, with terminal flooding and flight cancellations lasting several days
- Major road networks, including Sheikh Zayed Road in Dubai, were inundated and impassable for 24-72 hours
- Residential communities experienced flooding that displaced thousands and caused extensive property damage
- Schools and businesses were closed for extended periods across the UAE
- Economic losses estimated in the billions of dollars
Climate Attribution: Was This Climate Change?
Rapid attribution analysis conducted by the World Weather Attribution (WWA) initiative and other research groups provided important context for understanding the event's relationship to climate change.
What the Science Shows
The Clausius-Clapeyron relationship — a fundamental principle of atmospheric physics — dictates that for every degree Celsius of warming, the atmosphere can hold approximately 7% more water vapour. This means that when rain-producing weather systems do occur, they have more moisture available to produce heavier rainfall. The Arabian Peninsula has warmed by approximately 1.5-2.0°C since pre-industrial times, implying that extreme rainfall events now carry 10-14% more moisture than they would have without human-caused warming.
Attribution studies for the April 2024 event indicated that climate change made the extreme rainfall significantly more intense and more likely than it would have been in a pre-industrial climate. While the synoptic weather pattern that triggered the event could have occurred naturally, the volume of rainfall it produced was amplified by the warmer, moister atmosphere.
Beyond Single Events
The April 2024 floods were not an isolated occurrence. The Gulf region has experienced a pattern of increasingly intense rainfall events in recent years:
- March 2016: Severe flooding in Jeddah, Saudi Arabia
- October 2021: Cyclone Shaheen brought record rainfall to Oman's northern coast
- November 2022: Heavy rainfall caused flooding in parts of Qatar and Saudi Arabia
- July 2022: Severe flooding in northern Oman from tropical storm
Climate models consistently project that extreme precipitation events in the Gulf region will become more intense under continued warming, even as average annual rainfall may remain low or decrease slightly. This combination — more intense individual events within a generally arid climate — poses particular challenges for infrastructure design.
Infrastructure Design Failures
The scale of damage from the April 2024 floods exposed several systemic failures in how Gulf cities have been designed and built.
Drainage System Capacity
Urban drainage systems across the Gulf are typically designed for return periods of 5-25 years, reflecting the region's arid climate and the historical rarity of extreme rainfall. Many systems were designed using Intensity-Duration-Frequency (IDF) curves based on historical rainfall records that do not account for climate change-driven intensification.
The April 2024 event exceeded the design capacity of virtually all urban drainage infrastructure in the affected areas. Even systems designed to the higher end of regional standards were overwhelmed, as the rainfall intensity exceeded design assumptions by factors of 3-5x.
Impervious Surface Expansion
Rapid urbanisation across the Gulf over the past 30 years has dramatically increased impervious surface coverage — roads, buildings, parking areas, and other hard surfaces that prevent rainfall from infiltrating into the ground. In Dubai, the estimated impervious fraction in developed areas exceeds 80%, meaning that virtually all rainfall becomes surface runoff that must be handled by drainage infrastructure.
This creates a dangerous feedback loop: as cities expand, runoff volumes increase, but drainage systems designed for earlier, less developed conditions cannot accommodate the additional flow.
Subsurface Infrastructure
Much of the Gulf's critical infrastructure — electrical substations, telecommunications equipment, metro systems, building basements — is located below ground level without adequate flood protection. The April 2024 floods caused extensive damage to subsurface systems that were never designed to be exposed to standing water.
"The April 2024 floods were a system-level failure, not a single point of failure. Drainage capacity, urban planning, building design, emergency response, and climate adaptation planning all fell short simultaneously. The lesson is that resilience must be addressed holistically."
What Qatar Can Learn
Qatar was not directly affected by the April 2024 event, but the lessons are directly applicable to Doha and other Qatari cities that share similar geographic, climatic, and infrastructure characteristics with the affected areas.
Drainage Standards Review
Qatar's drainage design standards, implemented through Ashghal (Public Works Authority) and managed under the Qatar Sewerage and Drainage Design Manual, should be reviewed to assess whether current design return periods and rainfall intensity assumptions adequately account for climate change. Specific recommendations include:
- Updating IDF curves to incorporate climate change allowances, adding 20-40% to current design intensities for systems with design lives exceeding 25 years
- Increasing minimum design return periods for critical infrastructure (airports, hospitals, power stations) from current standards to at least 1-in-100-year events
- Requiring climate risk screening for all new drainage infrastructure projects
Sustainable Urban Drainage Systems (SuDS)
Qatar should accelerate adoption of SuDS approaches that reduce surface runoff through:
- Permeable pavements: In parking areas and low-traffic roads, permeable surfaces can infiltrate rainfall directly, reducing peak runoff rates
- Wadi restoration: Natural wadis and drainage channels that have been encroached upon or culverted should be restored to provide flood storage and conveyance
- Detention basins: Engineered basins that temporarily store floodwater and release it slowly can prevent downstream flooding without requiring oversized pipe networks
- Green infrastructure: Landscaped areas, green roofs, and bioswales provide multiple benefits including flood attenuation, urban heat island reduction, and biodiversity habitat
Building Resilience Standards
Building codes should incorporate flood resilience measures for all new construction in flood-prone areas:
- Minimum finished floor levels raised above projected flood levels
- Electrical and mechanical systems elevated above potential flood depths
- Flood-resistant materials specified for ground-floor construction
- Sump pumps and back-flow prevention as mandatory requirements for basement construction
EIA Requirements for Drainage and Flood Risk
The April 2024 floods reinforce the critical importance of comprehensive flood risk assessment within Environmental Impact Assessments for development projects across the GCC. As a GAB-accredited verification body, GSustain recognises that EIA requirements must evolve to address climate-driven flood risk adequately.
Key EIA requirements should include:
- Flood risk assessment: All development projects should include a flood risk assessment that considers both fluvial (wadi) and pluvial (surface water) flooding under current and projected future climate conditions
- Drainage impact assessment: Projects must demonstrate that post-development runoff rates and volumes do not exceed pre-development conditions, using SuDS and attenuation as required
- Climate change allowance: Flood risk assessments must apply climate change allowances to rainfall intensities and sea levels, based on the latest IPCC projections for the region
- Cumulative impact: EIA must consider the cumulative drainage impact of multiple developments within the same catchment, not just the individual project in isolation
- Emergency response planning: For large developments, EIA should include flood emergency response plans addressing evacuation, communication, and critical service continuity
Integrating Climate Resilience into Planning
The fundamental lesson of the April 2024 floods is that climate resilience cannot be treated as an optional addition to infrastructure planning — it must be embedded as a core requirement. For Qatar, this means:
- Updating the Qatar National Master Plan to incorporate climate risk as a central planning consideration
- Requiring climate impact assessments for all major infrastructure investments, with design specifications that account for projected conditions over the asset's full design life
- Investing in flood monitoring and early warning systems that can provide advance notice of extreme rainfall events
- Establishing clear institutional responsibility for climate adaptation planning, with authority to enforce standards across government and private sector development
The April 2024 floods were a warning that the Gulf's infrastructure was designed for a climate that no longer exists. The question facing Qatar and its neighbours is whether they will heed that warning before the next extreme event tests their systems to failure.