Millions  mice have been creating havoc in Australia. The state  New South Wales is suffering  its worst mouse plague  decades. The mouse population started growing  farms in spring last year because  a bumper wheat harvest. The rodents have been causing farmers a major headache  over a year. The plague has now caused problems  a prison. The Wellington Correctional Centre, about 350km west  Sydney, has been forced to evacuate. Up to 200 staff and 420 prisoners have been transferred to other jails  the region because of health and safety reasons. It will take 10 days  the prison to be cleaned and for repairs to electric cables and woodwork to be carried .
Mice have been causing damage to buildings  the region. Their droppings have become a health hazard that has cost hundreds  thousands of dollars to clean . In addition, they have chewed through electrical wiring, which has become a danger to property and human life. Prisons spokesperson Peter Severin spoke  the cleaning and repair operations at Wellington. He said: "The health, safety and wellbeing  staff and inmates is our number one priority, so it's important  us to act now to carry  the vital repair work....We need to take this step now to ensure the site is thoroughly cleaned and infrastructure is repaired." Staff will also look  ways to protect  plagues  the future.