There is a national solidarity never seen before in the history of the country . '' NEW : Authorities warn about health risks of flood-contaminated water , food . Comment: 79,000 people homeless , 19 missing ; landslides caused much of the damage . Brazilian president releases almost $ 1 billion in aid to affected areas .
NEW : Authorities warn about health risks of flood-contaminated water , food . Comment: 79,000 people homeless , 19 missing ; landslides caused much of the damage . Brazilian president releases almost $ 1 billion in aid to affected areas .