(Ulet Ifansasti/Getty Images) #Laborers work at a construction site near Baiturrahman mosque on the fifth anniversary of the 2004 Boxing Day earthquake and tsunami, on December 25, 2009 in Banda Aceh, Indonesia.
(Ulet Ifansasti/Getty Images) #A Thai official makes the final checks on the country's first tsunami warning buoy at the Cape Panwa in Phuket island, southern Thailand on December 1, 2009.
In the early hours of the morning of Sunday 26 December 2004 a massive earthquake measuring 9.0 on the Richter scale struck the west of northern Sumatra.
The quake triggered a powerful tsunami that swept the coasts of neighbouring countries and causing serious damage and loss of life.
Many hospitals and health centres were destroyed or damaged with health workers among the victims.
In some places, water supplies were disrupted and contaminated, making clean drinking water difficult to obtain.
I'd also like to direct your attention to a fantastic multimedia presentation on this subject from Thomson/Reuters called Surviving the Tsunami.
(25 photos total)An Acehnese man cries as he attends a mass prayer for tsunami victims, commemorating the fifth anniversary of the 2004 Boxing Day earthquake and subsequent tsunami, on December 26, 2009 in Banda Aceh, Indonesia.
(REUTERS/Andrew Caballero-Reynolds) #In this photo taken December 2, 2009 tsunami survivors Irvan Sahputra (left), Syamsuddin Mohammed (center) and Aris Monandar (right) stand near a fishing boat that saved their lives when it was stranded on a roof of a neighbor's house in Banda Aceh nearly five years ago.
(ROMEO GACAD/AFP/Getty Images) #Acehnese men read the Quran at a mass grave site during commemorations on the fifth anniversary of the 2004 Boxing Day earthquake and tsunami, on December 26, 2009 in Banda Aceh, Indonesia.