Messages are passed to the crews from the islands. The crews also bring messages.
The operations manager of volunteer group Vinaka Fiji, Elenoa Nimacere, said there were no local builders.
"We need help. We are seeking people to come and restore lives.
"Builders, plumbers and electricians are all needed."
Vinaka Fiji is looking to get schools running first, clearing the way for adults to rebuild the villages.
Not only is the call going out for skilled workers, but also for tools and equipment.
Ms Nimacere said it was an extensive list. "We need saws, hammers, nails, anything for building houses. One of the key things are wheelbarrows - they are really important."
Wheelbarrows could assist villagers in rebuilding gardens and replanting crops. Spades and forks were also needed.
Teams led by Vinaka Fiji staff are visiting villages to find out what they need. Food is the main priority, as most local crops have been flattened.
Ms Nimacere said an estimated 2000 villagers on Naviti Island had very limited food.
"Their crops have been wiped out."
To learn how you can help: Visit vinakafiji.org.fj.