Kenya, Northern Tanzania: Disruptions due to flooding ongoing across parts of both countries as of Nov. 15

Disruptions due to flooding are ongoing across many parts of Kenya and northern Tanzania as of Nov. 15. Heavy rainfall since late October has resulted in several rivers overflowing and widespread flooding across the region. Authorities in Kenya have reported at least 46 flood-related fatalities and around 58,000 people have been displaced. Flooding has affected 19 out of the country's 47 counties, with the worst affected areas in northern and eastern Kenya, including Garissa, Isiolo, Mandera, Marsabit, Samburu, Tana River, and Wajir counties. Floodwaters and debris have made several roads impassable in affected areas, including the Mombassa-Nairobi road in Makueni County.

Authorities in Arusha Region in northern Tanzania have reported at least ten flood-related fatalities and around 90,000 people across the region have been displaced. The worst affected areas of the region include Elerai, Morombo, Muriet, and Terrat. Dozens of homes have been submerged and several roads and bridges have been washed away by the floodwaters.

Disruptions in flood-affected areas will likely continue for some time as response and recovery operations continue. Further rainfall and isolated thunderstorms are forecast in the region through at least Nov. 19 and further showers are likely throughout the remainder of the vuli rainy season through December. Heavy downpours will likely trigger additional flooding and hamper ongoing relief efforts.

Further sustained heavy rainfall could trigger additional 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 heavy rainfall has saturated the soil.

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.

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.

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.