We're on a mission with Iceland's Coast Guard to the already affected area by what could soon be a 1massive 2volcanic eruption. 

"You can see how everything here is 3on knife's edge, but of course, the authorities are doing everything they can to save the town and save the 4infrastructure."

The town is called Grindavik. 

Massive 5cracks in the roads show the places where pressure from an underground magma 6stream has already 7burst through the 8earth's crust. 

The ground now 9uneven as the crew says they've been 10observing the 11rift widening in the past days. 

"We see differences between days. Sometimes we see the crack a little bit wider." 

Grindavik was 12evacuated and could soon be completely destroyed by hot 13lava, authorities fear. 

"From up here, you can already see just how extensive the damage already is to the town of Grindavik. And that crack that you see runs all the way to the ocean."

Iceland is in an area of massive volcanic activity. While this part of the country had been 14dormant for around 800 years, scientists say, in the past two years, volcanic activity has 15come back to life with several major eruptions. 

We fly over the most recent one, past the mouth of the volcano and over seemingly endless lava fields still steaming hot even months after the actual eruption ended. 

On the ground, crews are 16working around the clock to try and build a berm to protect this 17geothermal power plant. 

And we also see the world-famous Blue Lagoon Hot Springs, normally a major tourist attraction, now closed down and also evacuated. The 18economic toll already 19immense.