Brazilian officials on Sunday resumed the search for hundreds of missing people in the wake of a massive dam collapse, with firefighter crews returning to mud-covered areas after a several-hour suspension over fears that a second dam was at risk of breach.

Authorities evacuated several neighborhoods in the southeastern city of Brumadinho that were within range of the B6 dam owned by the Brazilian mining company Vale. An estimated 24,000 people were told to get to higher ground, but by the afternoon, civil engineers said the second dam was no longer at risk.

Read more at PBS news.