As one of the world's leading geoscientists, Dr. Molly Martin knows that Earth is at a tipping point. Climate change is causing an increase in natural disasters and the whole of humanity is on notice. Realizing that things won't get fixed if she waits on bureaucracy, Molly and her family, joins international disaster response unit R.E.A.C.T.

When a super-volcano threatens the island of Hawaii, a team of rescue and disaster experts who are called in to help must race against the clock to save those in the path of the molten lava and stop the volcano for good.

As a megaquake threatens San Francisco, a series of foreshocks wreaks havoc across the city. Now an elite team of emergency service and disaster experts converge on the anticipated epicentre, working tirelessly to save as many lives as possible before the city is crushed into oblivion.

When a devastating winter storm freezes over the whole of North Carolina, climatologists and disaster relief experts are called in before the entire East Coast is destroyed.