Typhoon Haiyan, one of the strongest storms ever recorded, struck the Philippines in November 2013 with winds of up to 190 mph (305 kph). At least 10,000 people died in one Philippine province alone.
Good intentions 'aren't enough' when donating after a crisis such as Haiyan
The world is eager to help, but experts say sending the right kind of aid is essential
Faced with heartbreaking images of the typhoon-ravaged Philippines - the sea of corpses, communities reduced to rubble, mothers clutching their hungry children - the world is watching an epic tragedy unfold and looking for ways to help. The big question is how.
In the aftermath of mega-disasters such as Typhoon Haiyan, experts say there are some basic rules for those eager to do good: Forget the rummage-sale clothes, the old toys and the kind of supplies that will only stack up undistributed or damage an already weakened economy. Do send a cash donation to a respected charity.
"It absolutely should be money," says Professor Kathleen Tierney, director of the Natural Hazards Centre at the University of Colorado-Boulder, a research group on the social aspects and impacts of disasters around the world.
"Whether it's the US or abroad, one thing that typically happens after a major disaster is people want to donate stuff. This creates enormous logistical problems, and people receiving donations they could never conceivably use, like winter coats sent to people in the Caribbean."
When disaster aid is not properly thought out "you can end up undermining the local economy", Tierney adds. "Once you ship building materials halfway around the world, it turns out you've ruined the market" for those in the area. "If you want to see economic recovery, you don't want to send so many supplies that you create a situation where people can't survive in a business sense," she said.
The Red Cross, for instance, buys goods locally or domestically after disasters to help revive the economy, curb transportation costs and help guarantee culturally appropriate items are being used, says Jana Sweeny, the organisation's director of international communications.
Sweeny says there is a natural tendency for people to want to help after headline-making catastrophes, but that altruism can sometimes be misguided.
She recalls in the days after Hurricane Katrina, when storm survivors were evacuated to the Houston Astrodome, someone sent thousands of kilograms of cheese - a shipment far too big for any refrigerator there to hold. Another well-meaning donor dispatched a truckload filled with patent leather shoes.
"People absolutely have good intentions," Sweeny says. "Many of us see people who've lost everything. They're standing there with nothing. The instinct is that anything will help make their lives better. But that's not always the case."
Video: Chaos in stricken Philippine city amid wait for aid
After Hurricane Mitch devastated parts of Central America in 1998, Sweeny was working for the Red Cross in Arizona when a woman came in one day with a live pig she wanted to donate. The would-be benefactor thought it would be a good way for a farm family to start a new breed. Sweeny explained the many reasons she could not ship a live animal.
It all turned out well: The woman auctioned the pig off and gave the proceeds to the Red Cross.
Many experts say after massive disasters such as the one in the Philippines, it is best to contribute to humanitarian groups with a proven track record.
One reason is to avoid swindlers and scam artists who may try to appear credible by giving themselves names that sound like established charities, or are connected to the disaster. "It happens every time - people see the story on the news and look to help," says Matthew Viola, senior programme analyst at Charity Navigator. "Take your time and pick out a good one."
His charity's website, www.charitynavigator.org evaluates nearly 7,000 charities with a zero-to-four-star rating scale - only three-and-four star organisations are recommended - in a variety of categories, including transparency, accountability and the amount of money spent on actual programmes. It has a special link for donating to typhoon relief with tips, including how to ensure a contribution is designated for this disaster.
Experts also say donating to these organisations makes sense: they know the terrain, having worked on previous disasters in the countries, often have local partners and are going to be around over the long haul. In large-scale disasters, Tierney says "it really doesn't make a whole lot of sense for people to be parachuting in for a couple of months".
She says that was what happened after the 2010 Haiti earthquake, when small groups travelled to the impoverished nation to construct new housing and sometimes made things worse by building in areas at high risk for future flooding or other weather calamities. "When people aren't aware of the local customs and local risks, they can make tremendous mistakes," she says.
Rebuilding, she says, is far more complicated than just collecting money to pour into a disaster zone. Numerous questions have to be considered: Will the aid contribute to the rehabilitation? Will it be used in a culturally sensitive way? Will it intensify social inequality?
Some of those very problems cropped up when smaller charities decided to build homes in Sri Lanka after the 2004 tsunami, says Chris Palusky of World Vision, a Christian humanitarian organisation.
One group put up tin shacks, while another constructed nice homes, creating a deep sense of inequality, says Palusky, a director at the group. In another instance, homes were built that were not up to code and were on a property line, creating disputes among families.
They eventually were torn down - illustrating the need, Palusky says, for strict standards and the importance of co-ordinating with local governments.
These "mom and pop" charities, he says, "go into the field with the best intentions, but sometimes the best intentions are the road to hell".
How to help
Through the Philippine consulate
Catholic Relief Services
UN World Food Programme