Germany: Adverse weather forecast across northwestern and southwestern regions through at least early Oct. 2

Heavy rainfall is forecast across parts of northwestern and southwestern Germany through at least early Oct. 2. Heavy downpours could trigger flooding in low-lying areas and landslides on unstable slopes. As of Oct. 1, the German Weather Service (DWD) has issued orange heavy rainfall warnings (the second lowest level on a four-tier scale) across parts of southern Baden-Wurttemberg and far southwestern Bavaria states through early Oct. 2. Rainfall totals of 3-4 cm (1.2-1.6 inches) with isolated higher amounts of up to 5 cm (2 inches) are expected in the affected area. Orange rainfall warnings are also in place for Bremen, central and western Lower Saxony, and northern North Rhine-Westphalia states through the evening Oct. 1. Rainfall totals of 2.5-4 cm (1-1.6 inches) are expected in the affected area. Officials could update and extend the coverage of weather alerts over the coming hours and days.

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 heavy rain 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. Severe weather could also trigger flight delays and cancellations at regional airports. Flooding could block regional rail lines; freight and passenger train delays and cancelations are likely in areas with 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.