North Korea has been hit by severe flooding, although it is not clear how severe the situation is given the poor access to reliable information out of the isolated nation. Pyongyang has not yet responded to offers of help from South Korea, the Unification Ministry in Seoul said on Friday. A spokeswoman said that all attempts at communication via the inter-Korean liaison office have failed. Floods in North Korea have caused massive damage in the north-west of the country over the past few days. According to the state news agency KCNA, over 4,000 households along the border town of Sinuiju near …