PartnerRe Ltd has estimated that it faces first-quarter losses of between $80 million and $100 million related to the floods and storms that have ravaged Australia this year.The announcement came in a statement released after the close of regular stock trading in New York today and is in addition to previous Australian flood losses from December last year.Torrential rain and widespread flooding impacted large areas of Australia, including Queensland and Victoria. Additionally, on February 3, Tropical Cyclone Yasi made landfall as a Category 4 storm in North Queensland, causing widespread property damage and flooding across the region.