This week on ANN...humanitarians respond to the worst tropical cyclone to hit Tonga in more than 60 years. ...catastrophic flooding in 2 northern provinces of Argentina affects more than 60-thousand people. ...and.. the Adventist University of La Plata in Argentina declares 3 days of mourning. 8 people associated with the school lose their lives in car accidents over a 2-day period . These stories and more coming up.