By Jose Serrano (staff@latinospost.com) | First Posted: Apr 27, 2015 06:38 PM EDT

Several aftershocks have swept through Nepal since a 7.8-magnitude earthquake rattled the landlocked country Saturday, killing an estimated 4,000 people and injuring at least 7,000.

Among the missing are 349 Australians, 674 French, and several hundred Britons. Three Americans are confirmed dead.

A 6.7-magnitude tremor centered about 50 miles east of Kathmandu sent people scrambling into buildings already damaged by the initial quake. Newer concrete structures remain intact but some mountain villages were reportedly left in ruins.

Some pharmacies and shops opened Monday despite repeated threats of aftershocks. Fearful they may get stronger, thousands of families another chilly night in open spaces, like parks and golf courses.

The Nepalese government is struggling to aid thousands left homeless, as well as reach those stuck in remote areas. Of great concern is not having enough medicine to treat waterborne and infectious diseases, including diarrhea and measles.

"We are overwhelmed with rescue and assistance requests from all across the country, said Deepak Panda, a member of Nepal's disaster management agency. "We are appealing for tents, dry goods, blankets, mattresses, and 80 different machines...that we desperately need now."

China's official Xinhua News Agency reported 25 dead in Tibet, and neighboring India claimed 61 deaths, in addition to the 4,000-plus total given by Nepal's Home Ministry.

At least 18 were killed at Mount Everest where an avalanche buried part of a base camp for foreign climber preparing to climb the summit. Some 200 stranded on the mountain have been rescued thanks clear weather that made helicopter assistance possible.

There are 14 international medical teams in or on their way to Nepal, as well as 15 international search-and-rescue teams. A Nepal army spokesman told the Associated Press that 90 percent of the country's troops are taking part in aid efforts.

India, China, the United States, and the United Kingdom are month those sending help. The Disasters Emergency Coalition - a group of UK aid charities that includes the British Red Cross - launched an appeal in response to the disaster. The British government has already pledged five million Euros, adding that it would dispatch RAF transport planes with a team of Gurkha engineers.

The U.S. government sent 70 American personnel and 45 square tons of supplies, according to the Department of Defense. Most of those sent are part of the International Development Disaster Response Team.

"The images that everybody has seen are gut-wrenching. Extraordinary devastation, young children carried away in ambulances, whole villages reduced to rubble," Secretary of State John Kerry said in a statement on Monday. "We are working very closely with the government of Nepal to provide assistance and support."

Kerry also said the U.S will be sending $9 million in relief, bringing total funds sent thus far to $10 million.

Apart from well-known relief groups like The Salvation Army, Oxfam, and the Red Cross, people around the world are finding other ways to donate.

Google has launched Person Finder, a crowd source database that allows anyone to report names of people that are missing. The platform was tracking about 4,800 Nepal visitors or residents by Sunday night. Facebook has activated Safety Check, which notifies users if they want to check on any friends visiting the country.

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