A massive rescue operation is under way in Central America and southern Mexico, where mudslides caused by a tropical storm have killed at least 250 people. That number is expected to rise as emergency services are continuing to find buried bodies as they reach more isolated villages. Tropical Storm Stan has passed, but heavy rain is still falling and river levels are dangerously high. The worst affected countries, El Salvador and Guatemala, are struggling to evacuate everyone at risk. Shelters in both countries are holding thousands of people, while road links have been cut off. In Mexico, reports are now coming in that dozens of people are missing. The death toll so far has been put at 79 in Guatemala and 62 in El Salvador. At least 19 deaths have been reported across Mexico, Nicaragua, Honduras and Costa Rica.