Due to massive coral bleaching events in the northern area of the Great Barrier Reef, the Australian government has elevated the emergency response level to the highest tier.

Australia has experienced warmer than usual temperatures, and the heat has taken a significant toll on the coral in the northern region of the Great Barrier Reef. 
Due to massive bleaching events, the government has elevated the emergency response level to the highest tier. 
Coral has a very limited temperature range in which it can survive, and excessively warm waters result in the breakdown between the coral and the algae within t