Czech Republic: Adverse weather forecast across central and southern regions July 22

Thunderstorms are forecast to break out across much of the central and southern Czech Republic July 22. Heavy rainfall, strong winds, and lightning may accompany storms. Rainfall totals of 4-7 cm (1.6-2.8 inches) are expected across the affected area. Heavy downpours may trigger flooding in low-lying areas, and strong winds could cause property damage and power outages. The Czech Hydrometeorological Institute has issued orange thunderstorm warnings (the middle level on a three-tier scale) across most of South Bohemian and parts of southwestern South Moravian and central, southern, and western Vysocina regions. Yellow thunderstorm warnings are in place across the rest of the affected area. Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming 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 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. Where significant flooding, landslides, or strong winds impact utility networks, disruptions to electricity and telecommunications services are possible.

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. Disruptive weather may cause delays and cancellations at airports in the affected regions. Flooding could block regional rail lines; freight cancellations are possible in areas with heavy rainfall and potential track blockages.

Localized business disruptions are possible in areas impacted by severe weather; some businesses might not operate at full capacity because of damage to facilities, possible evacuations, and some employees' inability to reach work sites.