toll stands at 7, but it is expected to rise much higher. reporter: a rescue worker struggles to pull a woman to safety. she is trapped in a atlantic, deep sludge, barely able to hold herself up. finally with some help, she is listed on to a helicopter, covered in mud, appearing exhausted. she is one of those rescued in a deadly disaster that is submerging homes, roads, cars, buses and people. it began when a mining dam burst early friday afternoon, near brazil s southeastern city of brumadinho. it sent huge piles of mud, trapping dozens of people. dozens of rescue workers have been deployed to free them. the company apologized for the disaster. the ceo asking for forgiveness from those affected.