The storms also triggered landslides and the partial collapse of a dam structure at a small hydro-electric power plant. Flooding from heavy rains battering Brazil’s southernmost state of Rio Grande do Sul has killed 39 people, according to local authorities, with the death toll expected to rise as dozens remain unaccounted-for.

Rio Grande do Sul’s civil defence authority said 68 people were still missing and at least 24,000 had been displaced as the storms affected more than half of the 497 cities in the state, which borders Uruguay and Argentina.

“These numbers can still materially change over the following days as we gain access to more regions,” the state’s governor, Eduardo Leite, told reporters on Friday local time.