Germany: Adverse weather forecast across parts of Baden-Wurttemberg and Bavaria states through at least early Sept. 24

Heavy rainfall is forecast across parts of southern Germany through at least early Sept. 24. As of Sept. 23, the German Weather Service (DWD) has issued an orange heavy rainfall warning (the second lowest level on a four-tier scale) across parts of eastern Baden-Wurttemberg and central and western Bavaria states. Rainfall totals of 2-3 cm (0.8-1.2 inches) are possible within the space of six hours overnight Sept. 23-24 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.