Somalia grapples with the looming impacts of an impending El Niño, exacerbating the ongoing climate change challenges. Recurrent riverine and flash floods, particularly in urban centers like Beletweyne and Jowhar, are of significant concern. Urgent action is needed to prepare for and mitigate the forthcoming El Niño floods, aiming to safeguard lives and mitigate economic losses. Key to this strategy is proactive flood management, involving timely evacuations to higher ground. Identifying suitable elevated areas serves a dual purpose, ensuring safety and facilitating aid delivery. In this regard a rigorous GIS & RS methodology by SWALIM considered nine crucial factors, such as historical flood extent, elevation, slope, topographic wetness index, drainage density, strategic boreholes, settlements, land cover, and roads, to isolate higher grounds suitable for evacuation. The resulting maps show safe areas for evacuation in case of flooding, while exercising discretion considering factors like proximity to schools, healthcare facilities, pest prevalence and any other unforeseen factors.

Rainfall Forecast: There is agreement among several forecast products that light to moderate rains of up to 100 mm is expected over the southwest state and central parts of the country, with some forecasting products anticipating more intense rains. The spatial variation of the consensus-based rainfall forecast is follows: Moderate rainfall of between 50 and 100 mm is expected over isolated areas in Galgaduud, Mudug and Hiraan regions. Specifically, such rains are likely over Ceel Buur district and southern parts of Cabudwaaq district in Galgaduud region, northern parts of Belet Weyne district in Hiran region, and northern parts of Jariiban district in Mudug region. Light rainfall of less than 50 mm is anticipated over Bakool, Hiraan, Galgaduud, Mudug, and Nugal regions. Rains of such intensity are also possible over northern parts of Bay region, southern parts of Bari region, and isolated areas in Sool, Togdheer and Woqqoyi Galbeed regions. Dry conditions are likely in extensive areas in the southern and northern parts of the country. In the north such dry conditions are expected over Awdal region, northeastern parts of Woqooyi Galbeed region, Sanaag and Bari regions. In the south, such dry conditions are likely over Gedo region, coastal parts of Middle Shabelle, Lower Shabelle, Middle Juba, and Lower Juba regions. However, there are chances of cloudiness leading up to light rains over some of these areas.

Given the recent evolution of warmer than average Sea- Surface Temperatures (SSTs) over the central and eastern equatorial Pacific Ocean, most global climate models have confirmed the presence and persistence of El Niño conditions throughout the October - December 2023 season. Moreover, similar warming of ocean waters near the East African coastline, together with cooling down of the waters near the western Australian coastline, which technically defines a positive Indian Ocean Dipole (IOD), is expected to lead to above normal rains over most parts of East Africa. Somalia’s Deyr (October - December) “short rains” season is associated with the somewhat-faster southward movement of the Inter-Tropical Convergence Zone (ITCZ) which dictates much of the country’s climate. According to ICPAC, the climate outlook for the “Deyr Short Rains’’ season indicates an exceptionally high likelihood (85 %) of enhanced rainfall over southern parts of the country encompassing the catchments of both Juba and Shabelle Rivers where up to 10 consecutive rainy days are probable. Upstream of the river catchments across the Ethiopian border, 4 - 6 consecutive rainy days are expected with higher likelihood of cumulative amounts exceeding 150 mm. In terms of associated risks, the enhanced amounts, more so consecutive rainy days, over Juba and Shabelle River catchments within the country and across the Ethiopian border will likely lead to flooding as from the third week of October. However, the forecast dry conditions over the southern parts of Somalia where the two river catchments lie in the month of September offer some lead time for intervention measures to be put in place to mitigate the potential flood risks. The forecast dry conditions over the agricultural zones in the southern parts of the country in the month of September are also opportune for land preparation. The subsequent rains will likely lead to substantial recharge of water sources, replenished water catchment levels, and improved soil moisture conditions. These will create favorable conditions for grass regeneration, offering fodder for the livestock, and timely crop planting across the agro-pastoral livelihoods.

Review of the 2023 March-April-May (MAM) seasonal rainfall has demonstrated three key points: First, there was an early transition into the Gu (April-May-June) long rains season in Somalia this year. Secondly, above Long Term Mean (LTM) rainfall was received over Puntland and Somaliland and below LTM over South and Central Somalia. Thirdly, the observed rainfall was more in agreement with the forecast over South and Central Somalia and less over Somaliland. The early onset of the generally above-LTAM MAM rainfall led to substantial recharge of water sources, replenished water catchment levels, improved soil moisture conditions, creating favorable conditions for pasture regeneration, offering first line fodder for the livestock. It also favored land preparation and timely crop and fodder planting across the agro-pastoral livelihoods. However, the exceptionally heavy rains over both Shabelle and Juba River catchments in Ethiopian Highlands and the already-soaked soil conditions over the catchments within Somalia led to excessive overbank spillage resulting to devastating floods at Belet Weyne from 9th May, at Bulo Burti from 25th May and at Jalalaqsi from 26th May 2023. Flash floods occassioned by localised rains also occured in several places within Somalia like Bardheere from 23rd March 2023. The floods led to extensive damage to farmlands with earlier-grown crop and fodder and the grassland plains with devastating implications. Nonetheless, the MAM rains generally led to improved food security situation across the country particularly in the case of Somaliland where the observed rains were above LTM. The wetter than average projected rainfall conditions are likely to at least slow the loss of soil moisture and support agricultural and livestock productivity over South and Central Somalia over which below LTM Gu rains were observed. This bulletin presents both qualitative and quantitative review of the temporal and spatial variation of observed-, and verification of the forecast Gu rainfall season.

Moderate rainfall expected over southern coastal regions with light rains predicted over most other parts of Somalia during the forecast period (Map 1). The spatial distribution of the cumulative rainfall amounts is as follows: Moderate rainfall of between 50 and 100 mm is expected over the areas next to the coastline in the southern part of the country. These areas include the eastern and coastal parts of both Badhaadhe and Kismaayo districts, eastern and southern parts of Afmadow district, and the entire Jamaame district in Lower Juba region. Similarly, moderate rains are also likely over Jilib district and the isolated areas in the southern part of Buále district in the Middle Juba region and over several areas in southern and western parts of both Sablaale and Baraawe districts in Lower Shabelle region. Some isolated areas in the north particularly over Eerigavo in Sanaag region are also likely to receive moderate rains. Light rainfall of less than 50 mm is expected over several areas in Afmadow district and the western parts of Badhaadhe and Kismaayo districts in Lower Juba region; Saakow district and northern parts of Buáale district in Middle Juba region; and southern and eastern parts of Baardheere district in Gedo region. Similar rains are likely over Qoryoley, Kurtunwaarey, Marka, Afgooye and Wanla Weyne districts in Lower Shabelle region; several areas in Middle Shabelle and Bay regions; non-coastal areas of Ceel Dheer district in Galgaduud region; and non-coastal areas of both Xaradheere district and southern Hobyo district in Mudug region. In the northern parts of the country, such light rains are likely over southern and central parts of Hargeisa district in Woqooyi Galbeed; several isolated areas in Togdheer region; Xudun and Caynabo districts in Sool region; central border areas of Ceel Afweyne and Ceerigaabo districts, northern parts of both Ceerigaabo and Laasqoray districts in Sanaag region, areas in southern Bossaso district and northeastern parts of Iskushuban district in Bari region. Similarly lighter rains are also likely over the border areas between Garowe and Eyl districts in Nugaal region. Light rains of less than 50 mm are expected over several areas in Afmadow district and the western parts of Badhaadhe and Kismaayo districts in Lower Juba region; Saakow district and northern parts of Buáale district in Middle Juba region; and southern and eastern parts of Baardheere district in Gedo region. Similar rains are likely over Qoryoley, Kurtunwaarey, Marka, Afgooye and Wanla Weyne districts in Lower Shabelle region; several areas in Middle Shabelle and Bay regions; non-coastal areas of Ceel Dheer district in Galgaduud region; and non-coastal areas of both Xaradheere district and southern Hobyo district in Mudug region. In the northern parts of the country, such light rains are likely over southern and central parts of Hargeisa district in Woqooyi Galbeed; several isolated areas in Togdheer region; Xudun and Caynabo districts in Sool region; central border areas of Ceel Afweyne and Ceerigaabo districts, northern parts of both Ceerigaabo and Laasqoray districts in Sanaag region, areas in southern Bossaso district and northeastern parts of Iskushuban district in Bari region. Similarly lighter rains are also likely over the border areas between Garowe and Eyl districts in Nugaal region. Dry conditions are expected over the entire Awdal region and several areas in Gedo, Bakool, Hiraan, Galgaduud, Mudug, Nugaal and Bari regions. In the northern parts of the country, such dry conditions are likely over Berbera district and the northern parts of both Gebiley and Hargeisa districts in Woqooyi Galbeed; northern parts of Ceel Afweyne district, northwestern, southern and eastern parts of Ceerigaabo district and central and southern parts of Laasqoray district in Sanaag region; Caluula, Qandala, Qardho, and Bandarbeyla districts and southern parts of Iskushuban district and northern parts of Bossaso district in Bari region.

Light rainfall is predicted over the southern regions and some isolated areas in the north with dry conditions expected over most parts of Somalia during the forecast period. The spatial patterns of the cumulative rainfall amounts is as follows: Light rainfall of less than 50 mm is expected in the southern regions including: the eastern and coastal parts of both Badhaadhe and Kismaayo districts, eastern and southern parts of Afmadow district, and the entire Jamaame district in Lower Juba region; Jilib district and Buáale district in the Middle Juba region; Diinsoor district and northern border areas of Buur Hakaba and Baydhaba districts in Bay region; Sablaale district and the entire coastal parts of Lower Shabelle region, and areas around Mogadishu in Banadir region. In the northern part of the country, similarly light rains are likely over southern parts of both Gebiley and Hargeisa districts in Woqooyi Galbeed, the northern parts of both Ceerigaabo and Laasqoray districts over Sanaag region and areas bordering the three districts of Qandala, Iskushuban and Caluula in Bari region. Localized light rains in other parts of the country are as shown in the map. Dry conditions are expected over the rest of the country especially the entire Awdal region, many parts of Gedo, Bakool, Hiraan, Galgaduud, Mudug, Nugaal, Sool and Bari regions, northern Woqooyi Galbeed region and southern parts of Sanaag region.

Light rainfall of less than 50 mm is expected the southern regions including: Middle Juba region, the eastern and coastal parts of Lower Juba region, coastal parts of Lower Shabelle and Middle Shabelle regions, south and central parts of Bay region, some areas in eastern parts of Gedo region, and coastal parts of Galgaduud region and Ceel Dheer district in Mudug region. In the northern part of the country, similarly light rains are likely over southern parts of both Gebiley and Hargeisa districts in Woqooyi Galbeed, the northern parts of both Ceerigaabo and Laasqoray districts over Sanaag region and areas bordering Iskushuban and Caluula distrcits in Bari region. Dry conditions are expected over the rest of the country..

Since bursting its banks on May 9th, 2023, the Shabelle River’s water level at Belet Weyne (figure 1) has remained at a bankful height of 8.30 meters up to the current date of May 15th. Over the past week Belet Weyne town and its surrounding regions, has witnessed widespread and devastating floods (map 1). These floods have resulted in the destruction of homes, crops, and roads, as well as the displacement of numerous families and have impacted heavily on the transportation network. The river levels at Bulo Burti (figure 2), located about 100 km downstream of Belet Weyne, have shown a consistent increase from 5.74 meters on May 5th to 6.66 meters as of today, May 15th, 2023. The current reading at Bulo Burti (6.66 metres) surpasses the moderate flood risk threshold (put at 6.50 metres) by 16 centimetres . In contrast, at Jowhar, the reading today (3.75 metres) is more than 1 metre below the moderate risk level. However, it is anticipated that the water level at Bulo Burti will reach the high flood risk level in approximately two days, as the flood wave continues its downstream movement from Belet Weyne. Nevertheless, the presence of multiple river breakages downstream of Belet Weyne could mean that some water may escape the channel before reaching Bulo Burti. This scenario reduces the magnitude of flooding in the town compared to the situation witnessed in Belet Weyne. It is important to note that the floodplains located upstream of Bulo Burti remain highly susceptible to flooding. No rainfall has been reported in both Belet Weyne and Bulo Burti over the past week. The weather forecast for the next three days, from May 15th to 17th, 2023, predicts dry conditions across Somalia. Only a light cumulative rainfall of approximately 10 mm is expected much farther upstream in the Ethiopian Highlands, within the Shabelle River catchment area. Despite the absence of recent rainfall, flooding persists in Belet Weyne. There still remains a high risk of flooding in Bulo Burti and the surrounding floodplains. It is crucial for communities residing near riverbanks and low-lying areas to exercise utmost caution and take all necessary precautions to ensure their safety.

Light rainfall is expected over most parts of Somalia with moderate rains over isolated areas in northeastern and dry conditions over southwestern parts of the country during the forecast period (Map 1). The spatial variation of the cumulative rainfall amounts is as follows: Moderate rainfall of between 50 mm and 100 mm is likely over Bari region particularly Iskushuban district, southern parts of Calulla district, eastern parts of Qandala district and southern parts of Bandarbeyle district. Moderate rains are also expected in isolated areas in the northwestern part of Ceerigaabo district in Sanaag region and over the areas on the border between Garowe and Eyl districts in Nugaal region. In the central regions, rains of similar amounts are expected over Cadale district in Middle Shabelle region, southern parts of Ceel Dheer district in Galgaduud region, Qoryooley district and eastern parts of Kurtunwaarey and Baarawe districts in Lower Shabelle region. Light rainfall of less than 50 mm is expected over several areas in the Country with a tendency towards moderate over eastern parts of Bari region, northern parts of Sanaag region, Garowe and Eyl districts in Nugaal region, Ceel District in Galgaduud region, Cadale and Adan Yabaal districts in Middle Shabelle region, and several areas in Lower Shabelle region. Light rains are also expected over Central BeletWeyne district and Jalalaqsi district in Hiraan region. Dry conditions are expected in the southwestern parts of the country particularly over Gedo, Bakool and some parts of Hiraan regions including areas at their border with Bay region. Dry conditions are also likely in Mudug region particularly over Galdogob district, Gaalkacyo district and its border with Hobyo district. In Awdal region, dry conditions are expected over the northern parts of Zeylac and Lughaye districts. Similar conditions are likely over eastern part of Berbera in Woqooyi Galbeed region. Areas in the coastal strip of Bossaso, Qandala and Calulla districts in Bari region area also likely to remain dry. Moderate temperatures of between 24°C and 28°C are expected over several areas in the southern and northeastern parts of the country. Temperatures as low as 20°C are likely over some areas in the southern parts of Aw Woqooyi Galbeed regions, Sheikh district in northern Togdheer region and Ceerigaabo in Sanaag region and northern parts of Qandala district in Bari region. High temperatures of between 28°C and 32°C are expected in in Hiraan, Galgaduud, mudug, Nugaal, and Sool regions, southern and eastern parts of Bari region, and northern parts of both Awdal and Woqooyi Galbeed regions. Similar temperatures copnditions are also likely over Dollow and Luuq districts in Gedo region. Temperatures as high as 36°C are likely over eastern parts of Hobyo district in Mudug region.

For close to two weeks, Belet Weyne town and its surrounding areas have witnessed widespread and devastating floods occasioned by the Shabelle River bursting its banks on the 9th May 2023. The river has remained at a bankful height of 8.30 meters up to the current date of May 22nd. The widespread flooding has resulted to property damage, and population displacement. Over the last two days, the flood water has begun slowly receding from Belet Weyne town and the surrounding areas back into the river, and progressively flow downstream. Subsequently, the river level at Bulo Burte has steadily risen, with today’s (22nd May) level just 13 cm below the high flood risk level. The river level at Jowhar has stagnated below moderate flood risk level (5.0 m) since the beginning of the Gu rain season. Today’s level is 3.75 m and is exactly equal to its normal mark in this season. Although the loss of flood water through overbank spillage between Belet Weyne and Bulo Burte explains the delay in Jowhar river level rise, it is expected that the high river levels at Bulo Burte will be transmitted to Jowhar and eventually to Balcad within the coming week. No rains have been reported in the last week over South Central Somalia including the entire stretch of Shabelle River from Belet Weyne to Balcad. Although light rains to dry conditions are predicted over the coming week, the steady rise in river levels at Bulo Burte poses a HIGH-RISK OF FLOODING in the town and the adjacent areas. A MODERATE RISK OF FLOODING is foreseen in Jowhar and the adjacent areas over the same period. Given the expected loss of water to overbank spillage and breakages along the Shabelle river channel, the risk of flooding reduces as the waters flow downstream to Balcad. Therefore, as the flood water recedes back to the river, residents of Belet Weyne are urged to beware of crocodiles that could have escaped the river on to the floodplains. They should also beware of the risks of drowning. As the residents prepare to relocate back to the previously flooded areas, housing structures need to be assessed for safety. In order to prevent water borne diseases, proper hygiene including disinfection measures such as chlorination of water sources should be adopted. The residents of Bulo Burte should prepare for potential evacuation by identifying safe routes to high grounds and gathering essential items, inform family, friends, and neighbors about the flood warning, secure property and consider assembling an emergency kit with necessary supplies. Residents are also strongly recommended to stay informed through regular bulletin updates at specified times, monitor thorough radio, television and internet for flood warnings. Any open or weak river embankments within Jowhar should be closed and reinforced.