Heavy rains claimed lives and triggered flood alerts in the Lower Silesia region of south-western Poland Friday as emergency crews scrambled to sandbag low-lying areas to ward off rising river waters. A man working on road construction is believed to have drowned Friday after being swept away by the waters of the Sola river swollen by heavy rain in southern Poland, according to Poland's TVN24 news channel.

One elderly woman died Thursday night from a heart attack during an evacuation by emergency crews.

Flood alarms were called in the Jelenia Gora region bordering both Germany and the Czech Republic as rivers rose 30 centimetres over flood alert levels overnight.

Meteorologists predicted more rain for south-western regions of Poland, raising further the risk of flooding.