Losses from the storm last week in the Pacific Northwest region of the US could rise to more than $500m, according to AIR Worldwide.
Peter Daily, AIR's director of atmospheric science for research and modelling, said: "The wind speeds observed from last week's storm were similar or a bit higher than those of the 1993 storm but were more widespread, extending south to Oregon and east to Montana, so total damage is likely to be higher.”
The storm saw winds of more than 90 mph, heavy rainfall and flash flooding.