Why Sorsogon Is Typhoon-Exposed
Sorsogon sits at the far southeastern tip of the Bicol Peninsula, bordered by the Pacific Ocean to the east and the San Bernardino Strait to the south, a position that leaves the province with almost no geographic shielding from incoming storms. Historical typhoon tracks recorded for the province include Milenyo, Herming, and Iris, three of the more destructive storms to pass through the area since 1951.
According to the Joint Typhoon Warning Center, the Northwest Pacific Basin sees an average of 26.6 typhoons and tropical cyclones each year, with activity peaking between July and November, the same window Sorsogon sees its highest storm frequency. The province also sits along the Pacific Ring of Fire, with historical earthquakes reaching as high as magnitude 7.2 in 1988, alongside events in 1954 (Mw 6.8) and 1965 (Mw 5.0).
Source: JTWC Annual Tropical Cyclone Report.
Economic Risk from Typhoons in Sorsogon
Modeled loss data from the World Bank's Philippines Catastrophe Risk Assessment (2018), developed with AIR Worldwide using historical and simulated storm catalogs.
On a long-term average basis, Sorsogon is expected to incur 740 million PHP per year in losses to public and private assets from typhoons and earthquakes combined. Over the next 50 years, Sorsogon has a 40% chance of experiencing losses exceeding 11.0 billion PHP, and a 20% chance of exceeding 20.1 billion PHP.
Typhoons account for the large majority of Sorsogon's disaster-related economic loss, roughly 6 times greater on average than losses from earthquakes.
Private Assets
145 billion PHP
87% of total asset replacement value
Public Assets
22 billion PHP
13% of total asset replacement value
Source: World Bank / GFDRR, 2018. Asset values as of 2015.
Modeled Typhoon Loss by Return Period
A return period estimates how often a loss of a given size is likely to occur. A 100-year return period means that scale of loss has roughly a 1% chance of happening in any given year.
| Exceedance Probability | Return Period | Direct Loss (PHP Billions) | % of Asset Value | Emergency Loss (PHP Billions) |
|---|---|---|---|---|
| AAL | — | 0.635 | 0.4% | 0.104 |
| 10.0% | 10 years | 1.183 | 0.7% | 0.181 |
| 3.3% | 30 years | 4.034 | 2.4% | 0.682 |
| 2.0% | 50 years | 6.545 | 3.9% | 1.138 |
| 1.0% | 100 years | 10.011 | 6.0% | 1.783 |
Emergency loss represents an estimate of the loss the national government may sustain from relief and recovery efforts, calculated as a proportion of direct loss. Source: World Bank / AIR Worldwide, 2018.
Sorsogon vs. Neighboring Provinces
Average annual loss from typhoons and earthquakes, compared across Sorsogon and its neighboring Bicol Region provinces.
Albay carries the highest typhoon-related average annual loss among the compared Bicol Region provinces, while Sorsogon, Northern Samar, Masbate, and Samar see comparatively lower modeled losses. Source: World Bank / AIR Worldwide, 2018.
Typhoon Safety Resources for Sorsogon
General safety guidance applies to Sorsogon residents. See PAGASA's Signal Warning System for current wind threat levels by area.
🚩 Check Your PSWS Signal
Understand what each PAGASA wind signal number means for expected impact in your area.
View Signal Warning System →🛟 General Safety Tips
Preparedness steps to take before and during a typhoon, applicable across the Philippines.
View Safety Tips →People Also Ask About Typhoons in Sorsogon
How much does Sorsogon lose to typhoons each year?
On a long-term average basis, Sorsogon incurs about 635 million PHP per year in direct losses to public and private assets from typhoons alone, according to World Bank and AIR Worldwide modeling. Typhoons account for roughly 86% of Sorsogon's combined typhoon and earthquake losses.
Why is Sorsogon so exposed to typhoons?
Sorsogon occupies the southernmost tip of the Bicol Peninsula, bordered by open ocean on multiple sides with the San Bernardino Strait to the south. Unlike inland or partially sheltered provinces, Sorsogon's coastline offers little geographic protection from storms entering the Northwest Pacific Basin.
What is Sorsogon's worst-case typhoon loss scenario?
At a 100-year return period, roughly a 1% chance in any given year, Sorsogon could see direct typhoon losses of up to 10.0 billion PHP, equal to about 6.0% of the province's total asset replacement value.
Are typhoons or earthquakes a bigger risk in Sorsogon?
Typhoons are the far larger risk. Sorsogon's average annual loss from typhoons is about 6 times greater than its average annual loss from earthquakes, 635 million PHP versus 106 million PHP.
How does Sorsogon compare to other Bicol provinces for typhoon risk?
Albay carries the highest typhoon-related average annual loss among nearby Bicol Region provinces. Sorsogon's modeled losses run lower than Albay's but remain significant given the province's small land area and near-total coastal exposure.
What percentage of Sorsogon's assets are at risk from typhoons?
Sorsogon's total asset replacement value is about 167 billion PHP, of which 87% (145 billion PHP) is private property and 13% (22 billion PHP) is public infrastructure. At a 100-year return period, modeled typhoon losses could reach about 6.0% of that total value.
Economic risk data sourced from: World Bank, UK Aid, GFDRR, and the Philippines Department of Finance, Province Risk Profile: Sorsogon, Philippines Catastrophe Risk Assessment and Modeling, January 2018, with technical modeling by AIR Worldwide. General typhoon information sourced from PAGASA and the Joint Typhoon Warning Center. ← Back to Typhoon Hub