Typhoon Cimaron, known in the Philippines as Super Typhoon Paeng, was the most intense tropical cyclone to strike the Philippine island of Luzon since Typhoon Zeb in 1998. Originating from a tropical depression on October 25, Cimaron developed within an environment strongly favoring tropical cyclogenesis east of the Philippines. On October 28, the system underwent rapid intensification, culminating in attaining its peak strength with winds of . Estimates from the Joint Typhoon Warning Center ranked the system as a Category 5-equivalent super typhoon with one-minute sustained winds of , though this is argued to have underrepresented the typhoon's strength. The system moved ashore near Casiguran, Aurora in northern Luzon at peak strength. Crossing the island, Cimaron emerged over the South China Sea where conditions allowed for temporary reorganization. After becoming nearly stationary on November 1, the typhoon executed a tight anti-cyclonic loop and rapidly weakened. The storm degenerated into a tropical depression on November 4, before dissipating three days later off the coast of Vietnam.
Prior to impacting the Philippines, Public Storm Warning Signals #3 and #4, the two highest levels, were raised for several provinces in Luzon. Thousands of residents were urged to evacuate while local authorities prepared services for quick recovery efforts. With Cimaron initially expected to strike Vietnam, officials planned to evacuate 218,000 people; however, Cimaron's slow motion and demise over open waters resulted in these plans being suspended. Officials in Thailand and southern China also advised residents of possible effects from the storm.
In contrast to the typhoon's extreme intensity, damage was somewhat limited in the Philippines due to the lower population density of the affected areas. Widespread flooding and landslides caused substantial disruptions to travel and isolated some communities. Thirty-four people were killed in various incidents, mostly from flooding. Nearly 365,000 people were affected by the storm and losses amounted to 1.21 billion PHP (US$31 million). Winds along the periphery of Cimaron fanned a large wildfire near Hong Kong, and moisture from it fueled record-breaking rains in British Columbia, Canada. Relief efforts in the Philippines began soon after the storm's passage; however, two other storms struck the country in November, with one resulting in far greater damage. Following a request for international assistance in early December, more than US$10 million was provided in relief aid to the Philippines.
Meteorological history
On October 24, 2006, an area of disturbed weather, characterized by flaring convection around a low-level circulation, developed approximately east of Guam. Situated within a region favoring tropical cyclogenesis, the system consolidated as it tracked generally westward. Late on October 25, the Japan Meteorological Agency (JMA) classified the low as a tropical depression. With poleward outflow improving, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert the following day before initiating advisories on Tropical Depression 22W. Several hours later, the Philippine Atmospheric, Geophysical and Astronomical Services Administration assigned the storm the local name Paeng as was within their area of responsibility. Situated south of a strong subtropical ridge, the system maintained a general west-northwest track. On October 27, the depression strengthened into a tropical storm and was assigned the name Cimaron by the JMA. The small storm subsequently underwent a period of rapid intensification as dual outflow channels developed; the storm reached typhoon status early on October 28. At the end of this phase on October 29, Cimaron attained its peak intensity with winds of and a barometric pressure of 920 mbar (hPa; ).