Weather forecasters have warned that flooding may occur in several regions of the country as heavy rain continues to swell smaller rivers. A third degree flood alert was called on Friday afternoon for the river Velička in South Moravia. Lower-level flood alerts have also been called for the Karlovy Vary, Plzeň and Ústí nad Labem regions and some regions of Moravia. Up to 50 mm of precipitations have been registered overnight in some parts of the Czech Republic. More rain is expected over the next 48 hours.