The world inches closer to feared global warming 'tipping points': 5 disastrous scenarios Elizabeth Weise USA TODAY

Climate change effects usually become clear over decades and centuries, but they seem to be everywhere this summer: temperature records broken constantly, ocean waters as warm as hot tubs and world leaders so alarmed they've called this the "the era of global boiling."

And as concerning as these developments are, scientists have long worried about even more dramatic, looming and irreversible changes to the planet that could happen quickly. Even in the past year, there's evidence some of these scenarios are becoming more likely.