U.N. agencies estimate that 75 percent of the refugees or internally displaced people are women, children and young people. They are living in makeshift camps that are very crowded, with poor shelter and sanitation, food shortages and precarious access to healthcare, WHO aid Friday in a release.

In many cases, survivors have no access to even the minimum health and psychological support, leaving them vulnerable to a range of potential health problems, including HIV/AIDS.

WHO, the Kenyan Red Cross and other partners are helping the Kenyan Ministry of Health assess the services needed in 62 identified sites, covering at least 92,000 people in the south Rift Valley. WHO said it has reinforced its presence in the country with the deployment of a senior epidemiologist, a logistician and a security office.