Flood waters in Zambia have swept away roads, bridges and buildings, prompting the government to send in the army and help out.
At least eight people have died and hundreds of families have been forced to leave their homes.
Officials in charge of the massive Kariba dam on the border with Zimbabwe were given no choice but to open the flood gates. This now increases the chances of more downstream flooding on the Zambezi river in Mozambique.
Last year, heavy rain in Malawi and Zambia caused flooding in Mozambique that killed 45 people and left 285,000 homeless.