NEW : WHO warn about health risks of flood - contaminated water , food . Floods in southern Brazil accounted for 112 deaths , the news agency says . 300 people homeless , 19 missing ; landslides caused much of the damage . Brazilian government sent almost $ 1 billion in aid to affected areas .
NEW : Authorities warn about health risks of flood-contaminated water , food . Floods in southern Brazil blamed for 112 deaths , state news agency says . 79,000 people homeless , 19 missing ; landslides caused much of the damage . Brazilian president releases almost $ 1 billion in aid to affected areas .