From the rubble of an office building, a woman named Christine was signaling she was alive by clicking the remote control on her key chain and texting her friends.
At the Hotel Montana, searchers tried to save three more people trapped in the rubble Saturday afternoon -- one unconscious, but alive, and two women who were speaking, one in English, and another in French.
Even with all the frenzied activity and heroic rescues, there was no question that time was running out for all the trapped people.
And there was another massive time crunch -- the effort to get enough food, water and other aid material to desperate survivors in time to save them and prevent further looting and disorder.
Today was the first day that ABC News saw a significant presence of cranes, trucks and food deliveries, but it was not nearly enough.
Secretary of State Hillary Clinton, who landed in Haiti shortly before 3 p.m., reportedly carrying supplies for U.S. embassy staff, said she and Haitian President Rene Preval discussed "all the priorities of the Haitian government and the Haitian people."
"We are focused on providing humanitarian assistance, food, water, medical help to those who are suffering," Clinton said. "We also are working with the Haitian government of the continuing rescue of those who can be rescued."
She later directly addressed the Haitian people.
"We are here at the invitation of your government to help you," she said. "As President Obama has said, we will be here today, tomorrow and for the time ahead. Speaking personally, I know of the great resilience and strength of the Haitian people. You have been severely tested, but I believe Haiti can come back even stronger and better in the future."
But first came today.
Aid workers and doctors were trying to treat the wounded as supplies slowly got distributed, too slowly for the suffering people in this city who need so much.
Doctors Without Borders, which also goes by the French acronym MSF (Medecins Sans Frontieres), said its volunteers have been working "around the clock to treat the vast numbers of patients."
"Experienced MSF medical staff say they have never seen so many serious injuries," spokeswoman Emily Lindendoll said in a written statement, adding that doctors were working in bare-bones, improvised hospitals around the country, despite "little sign of significant aid distribution."
"The major difficulty here is the bottleneck at the airport, which has turned away a number of vital cargo flights," she added. "Lack of authorization to land at the airport has already caused a 24-hour delay of the planned arrival of MSF's much needed inflatable hospital."
There was acute medical need at Champ de Mar, a burgeoning tent city of 5,000 earthquake refugees, including children, where ABC News' senior health and medical editor Richard Besser visited. Clean water was virtually non-existant there, food was a luxury and garbage littered every corner.
A two-story building fell on Pierre Michlet, 48, and he was stuck under the rubble for 14 hours. Blocks of concrete crushed his feet.
When Besser, a medical doctor, saw him, his bandage was dirty and risked becoming infected if not changed quickly -- minor first aid for someone who needed major care, but a risk for a life-threatening infection after several days.