As relief efforts are ramped up following the West Sumatra earthquake on September 30, aid groups have warned that thousands of survivors of an earlier quake on the Indonesian island of Java are facing health risks unless they receive adequate shelter. Aid workers said some of the 196,000 people who have been sheltered in 24 camps for the displaced in West Java province after the September 2 quake have been exposed to extreme heat during the day and cold at night. People are living in huts, family tents or under tarpaulins. Some are built on open fields, and others are near what remains of survivors’ houses, said Tatang Husaini, programme officer for the Foundation for Disaster Control, an NGO that has been helping the displaced. The 7.3 magnitude earthquake left 81 people dead, with 1,297 injured and 41 missing. About 100,000 homes, 3,000 schools and 500 office buildings were damaged, according to the latest figures made available by the National Agency for Disaster Management (BNPB) on September 28.