Tag Archives: Thomas wildfire

Southern California: Thomas Fire Loss Estimate and Mudslide Commentary

Thomas Fire Loss Estimate

RMS has produced estimates for the insured loss arising from the Thomas Fire that affected the Southern California counties of Ventura and Santa Barbara in December 2017. The estimate will fall between US$1 billion and US$2.5 billion, and includes loss caused by burn or smoke damage to personal, commercial, and industrial lines of business, along with insured loss from business interruption and additional living expenses. It excludes loss to automobile and agriculture lines of business and all damage related to the recent mudslides that impacted the same area. This estimate was calculated using RMS high-resolution exposure data and comparisons against historical fire damage, loss, and claim data.

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California Wildfires: Exposure Impacted by the Thomas Fire

As the Thomas Fire continues to climb the list of the top twenty largest California wildfires for both acres burned and structures destroyed, many in the insurance industry are asking how this fire, in addition to the other burned areas across Southern California, will impact their portfolio. A critical element in understanding the industry impact, but also the significance for an individual book, is the insured value of the burned structures. The Thomas Fire, which at 60 percent containment at the time of publication is already the second largest fire in California history with a reported burn area of 272,000 acres (110,074 hectares), has affected several different communities with wide ranges of average insured value.

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California Wildfires: Special Climate Conditions Drive Enhanced Risk

Satellite image taken on December 5, based on observations of visible, shortwave infrared, and near infrared light. Image Credit: NASA

Wildfires are once again raging across California, this time focused in the southern part of the state. Prior to the ignitions, weather forecasts called for a significant Santa Ana wind event from Monday (December 4) through Thursday evening (December 7), driven by a high-pressure system across the western United States. The NOAA Storm Prediction Center noted in their Day 1 Fire Weather Outlook valid for Monday, December 4, that, “A very strong surface pressure gradient… coupled with strong low-level northeasterly flow will easily support sustained offshore winds of 30-40 miles per hour (48-64 kilometers per hour) across parts of Ventura into Los Angeles counties beginning later this evening and continuing through early Tuesday morning. Wind gusts of 60-80 mph (96-128 km/h) will be possible across the mountains/foothills of these counties where channeling and terrain effects can locally enhance the already strong flow, with gusts of 45-60 mph (72-96 km/h) likely at lower elevations.”

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