24 Nov 2022 | 03:57 PM UTC
Saudi Arabia: Disruptions due to flooding ongoing across Jeddah as of Nov. 24
Disruptions due to flooding ongoing across Jeddah, Saudi Arabia, as of Nov. 24. Further adverse weather forecast.
Event
Widespread flooding has been reported across much of Jeddah Nov. 24 triggered by heavy rainfall and thunderstorms since the early hours of the morning. Reports indicate around 17.9 cm (7 inches) of rain has fallen in parts of Jeddah. Numerous streets have been inundated by flood waters and several major routes are closed, including the main highway between Jeddah and Mecca. Power outages and water supply issues have been reported in parts of the city. Officials had already announced on Nov. 23 that schools across the city would be closed due to the anticipated adverse weather. King Abdulaziz International Airport (JED) announced that the departure of some flights were delayed Nov. 24 due to the current weather conditions and are urging passengers to contact their airlines for updates.
As of late Nov. 24, the National Center for Meteorology is maintaining a yellow heavy rainfall warning for Jeddah and further showers and thunderstorms are forecast Nov. 25 before conditions improve from Nov. 26. Flood waters are unlikely to recede in the coming hours due to the further forecast rainfall.
Hazardous Conditions
Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites located downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where the soil has become saturated by heavy rainfall.
Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.
Due to the arid nature of the region and poor stormwater management in some urban areas, even minor rainfall accumulations could quickly result in episodes of flash flooding. Flooding is possible in streams and wadis (dry riverbeds). Significant rainfall may be preceded by moderate winds and dust storms, though some areas - particularly desert areas - may experience high levels of dust without rain.
Transport
Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.
Severe weather could also trigger further flight delays and cancellations at airports at JED. Authorities may temporarily suspend port operations or close beach fronts along the Red Sea coast if strong winds trigger hazardous sea conditions. Flooding could block regional rail lines; freight and passenger train delays and cancellations are likely in areas that see heavy rainfall and potential track inundation.
Localized business disruptions may occur in low-lying areas; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.
Advice
Monitor local media for weather updates and related advisories. Confirm all transport reservations and business appointments before travel. Make allowances for localized travel delays and potential supply chain disruptions where flooding has been forecast. Do not drive on flooded roads. Charge battery-powered devices in the case of prolonged electricity outages.
