WARSAW, Poland (AP) — Massive floods pounded Central Europe on Monday, killing four more people in Poland and one in the Czech Republic.

By Kacper Pempel WROCLAW, Poland (Reuters) -Volunteers and emergency personnel worked through the night to fortify the Polish city of Wroclaw against approaching flood waters, while Hungary opened a dam as the prime minister warned a "crucial period" was approaching.

Volunteers in the Polish town of Nysa fortified floodwalls to stem swollen rivers on Tuesday after heavy rain and flooding round central Europe that has killed at least 18 people. Rivers were still spilling banks in the Czech Republic,