CHENNAI/BANGKOK (AFP) - Heavy rain in southern India triggered flash floods and landslides that killed 45 people in the last 24 hours and left about 1,000 tourists stranded, police said Tuesday. More than 70 deaths have been recorded across several districts in the state of Tamil Nadu in the last week, where downpours have caused widespread damage to buildings and ruined crops. Police and fire officials worked to rescue about 1,000 domestic tourists who were trapped after two major roads were cut off in the hillside district of Nilgiris, about 450km west of the state capital Chennai. Rescuers used cranes to remove giant boulders from railway tracks in the area, which received up to 61cm of rain over two days, police said. One village there was destroyed. The total number of deaths stands at 75. According to latest reports, 42 people have died in Nilgiris, an officer in the local police control room told AFP, referring to deaths overnight and on Monday. Another three were killed overnight in more southern districts of Tamil Nadu. Efforts were underway to help those trapped in debris, and authorities said most deaths were due to walls collapsing, drowning or electrocution. Schools were closed in several districts and forecasters predicted more rain on Wednesday. In Thailand, floods and mudslides in south of the country have killed 18 people and affected more than 300,000 over the past five days, the Interior Ministry said Tuesday. Ten provinces in the south have been hit by monsoon rains since Thursday, the Disaster Prevention and Mitigation department said in a statement. There are 18 people dead and 327,025 people have been affected. Currently the situation has eased in four provinces, it said. Ten of the deaths occurred in Narathiwat and six in Yala, two of the Muslim-majority southernmost provinces bordering Malaysia that have been gripped by a bloody separatist insurgency since January 2004.