Port-au-Prince , Haiti ( CNN ) -- It was as if the giant crowd were celebrating a joyous occasion -- not a coming-together one month after a deadly earthquake . Thousands of Haitians , many of them smiling , gathered Friday at the center of Port-au-Prince to remember the 7.0-magnitude quake of January 12 that leveled most of their capital city . A sea of people waved their arms in the air , prayed , cried , sang and -- where space permitted -- danced . The earthquake is blamed for killing more than 212,000 people , injuring 300,000 and leaving more than 1 million homeless in the city of 3 million and surrounding communities . The memorial took place near where the stately National Palace lies in ruins and the Champ de Mars square has been turned into a huge homeless camp . Other memorials were taking place at shantytowns , and there were religious observations . Haitians were urged to wear black or white . There was an outpouring of aid from around the world after the quake -- more than 600 aid agencies rallied -- but , initially , much of their work was ineffective because of the chaos , including the disruption of the government after its buildings collapsed . Relief operations are improving day by day , a spokeswoman for the International Rescue Committee told CNN on Friday . `` Things [ supplies ] are moving now , and they are arriving to populations . The bottleneck has really , really decreased , '' Aisha Bain said . `` About a month ago , when this quake destroyed the infrastructure of Haiti , it was very complicated to get aid in , '' she said . Now , `` the ports and airports are n't at full capacity , but things are arriving and getting to populations . There is much more to be done , but food is coming in . '' Food distribution areas are set up around the capital , she said . According to the U.S. ambassador to Haiti , food is now being delivered routinely to 16 sites daily , and Haitians are receiving two weeks of rations . The food is culturally appropriate , Kenneth Merten said . `` One month on ... I think we are in a very good place in terms of food distribution , water distribution and getting medicines out to needy hospitals , '' he said . The United States is working with many nations and organizations to do that . `` The next issues we 're most concerned about are sanitation issues and shelter issues , '' Merten said during a State Department news conference . As the rainy season approaches , `` we want to make sure we have reached and touched as many people as possible . '' The rainy season comes with the approach of spring . The hurricane season begins June 1 . Relief workers are providing temporary camps with latrines and portable toilets , and that project is n't finished , Merten said . Bain said her organization also is trying to provide sufficient sanitation . `` We ... are working on a large-scale buildup of providing clean water , latrines , showers , hand-washing stations , which affect not only the livelihoods of basic survival but , really , health . There 's a massive concern of the possible outbreak of disease , and so we are working to combat that quickly . '' Watch Bain talk about the situation in Haiti . On Thursday , Nevada real estate developer Tom Schrade said he was donating three used Cirque du Soleil tents for use as a temporary headquarters for the government and a hospital in Port-au-Prince . They will provide a total of 33,000 square feet of space , he said . Medically , `` things have improved in a very good way , '' compared with the period right after the quake , when doctors were dealing with broken bones , crushed limbs and other acute conditions , CNN 's Dr. Sanjay Gupta said . The medical establishment is much more organized . However , recovery facilities are grossly inadequate , he said . Of the people lined up recently at one of Port-au-Prince 's largest public hospitals , most were suffering from chronic diseases such as diabetes . Many have never seen a doctor , he said . After treatment , most patients -- even those who have had major surgery -- end up in a temporary tent city that is dirty and lacks medications , follow-up care and nutritious food , Gupta said . Recent rain did n't help , he said , and there is fear that improvements wo n't be made before monsoons come . `` People are trying to recover in a temporary tent city that is increasingly becoming more permanent , '' Gupta said .
Thousands unite in Port-au-Prince to remember 7.0-magnitude earthquake . Quake killed more than 212,000 people , left more than 1 million homeless in city , nearby . Anderson Cooper , Dr. Sanjay Gupta discuss Haiti news on `` AC360 , '' 10 ET tonight . Watch Angelina Jolie talk about her visit to Haiti on `` Amanpour , '' Sunday at 2 p.m . ET .