Local charities are working to help the victims of the earthquake in south Asia and the mudslides in South America.
Boxes contain water purification tablets and survival equipment
Devon-based members of the rescue group Rapid UK flew out at the weekend and have already rescued five people who were trapped in collapsed buildings.
Meanwhile, the Cornish-based charity Shelterbox is preparing 400 survival boxes to the area this week.
Shelterbox is also sending equipment to Guatemala, devastated by mudslides caused by Tropical Storm Stan.
The boxes contain a 10-man tent, sleeping bags, cooking stove and utensils, tool kit, plastic bags and water purification tablets.
They also include children's activity packs, containing pencils, crayons and colouring books.
Shelterbox spokesman Ian Munday said it was a challenge dealing with two natural disasters at the same time.
He said: "We keep about 400 boxes worth of equipment here in our Helston warehouse.
"The first 200 are packed and ready to go and another 200 are being packed now.
"Our first boxes should be out there by Thursday and subsequent boxes by Saturday."