For the third time in a week a national park black bear has been killed, this time in Yellowstone National Park where rangers said the bruin posed a threat to visitors and park employees.

Black bears in Denali and Grand Teton national parks recently were killed, one because it was acting aggressively, another because it obviously had come to associate humans with food.

In light of the wildfires sweeping California, it was only a matter of time before fire restrictions started popping up in national parks in the state. So it should be no surprise that officials at Sequoia and Kings Canyon national parks are implementing some restrictions.