US President Barack Obama has warned of a second disaster in Haiti, saying people should be under no illusion that the crisis there is over.<br/><br/> Mr Obama said the situation in Haiti remained dire almost two months after the earthquake struck. Mr. Obama was speaking after talks with Haitian President Rene Preval in Washington on Wednesday.<br/> <br/><br/>Mr Obama assured Mr Preval that the US would continue to help Haiti in its recovery and reconstruction efforts.<br/><br/>Mr Obama said there remained a desperate need for humanitarian help, especially as seasonal rains could threaten the more than a million Haitians left homeless by the quake on 12 January.<br/><br/>