Bermuda’s Endurance Specialty Holdings announced its initial loss estimate related to several natural catastrophes that occurred in the second quarter of 2013, including flooding in Canada and Europe and tornadoes in the US.The re/insurer estimates that its collective loss from these events will be $47.4 million, pre-tax and net of reinsurance and reinstatement premium. The flooding in Europe is the largest single event, representing approximately 50 percent of the total estimated aggregate loss.Endurance said its loss estimate is preliminary and is largely derived from the utilization of proprietary catastrophe modeling, standard industry models, an in-depth review of in-force contracts or initial indications from clients and brokers.Endurance said actual losses from these events may ultimately differ materially from the initial estimated losses due to nature of the risks assumed, the complexity of the assessment of damages and the limited number of reported claims received to date.