Thread by @kmp_phl

READ. What happened in Cagayan?

The past six typhoons (Pepito, Quinta, #RollyPH, Siony, Tonyo, and #UlyssessPH) have affected Region II, particularly Cagayan and Isabela provinces and overflowed the Cagayan River, the longest and largest river in the Philippines.

October 21 - Flooding and overflowing rivers due to rains brought by tropical storm Pepito in Cagayan Valley. Affected areas include 13 towns and 36 barangays, and 457 families composed of 1,576 individuals, 25 evacuation centers took in 295 families or 935 individuals.

Overflow bridges were declared impassable in Baggao, and Cabagan-Sta. Maria in Cagayan; Cabisera Otso and Baculod in Ilagan City, San Pedro and Manglad in Maddela, Quirino province, and other secondary bridges.

October 26 - Parts of Amulung and Alcala in Cagayan were flooded due to rains from Typhoon Quinta. A total of P4.7 million agricultural crops were damaged in Region 2.

Video here:

Flooding and overflowing of rivers and tributaries started in October.

November 1 - Heavy rains in Cagayan Valley region due to Super Typhoon Rolly.

November 5 - Typhoon Siony made landfall in extreme Northern Luzon. Tropical cyclone wind signal was hoisted over the northeastern portion of mainland Cagayan, including Santa Ana, and Gonzaga towns.

Continuous rains in Cagayan.

November 9 - Moderate to heavy rains in mainland Cagayan Valley due to Typhoon Tonyo.

November 10 - Non-stop heavy rains caused by Typhoon Ulysses. Among those instantly flooded were 14 barrios in Claveria town destroying millions worth of properties, rice lands, and livestock.

There were also landslides in Claveria, Sanchez Mira, and Pamplona in Cagayan. The tail end of a cold front brought heavy rains.

An estimate of 1,382 families or 4,779 individuals affected by floods and landslides in northern Cagayan.

Several rainfall warnings in Cagayan provinces on November 12. Serious flooding and landslides imminent.

November 12 - Magat Dam's water level reached 192.88 meters nearing its critical spilling level of 193 meters, all seven (7) gates of Magat Dam were opened releasing 6,244 cubic meters per second triggering widespread flooding.

Watch video here - facebook.com/bomboradyocaua…

Magat Dam, which main purpose is irrigation for 85,000 hectares of rice fields, is owned and operated by the National Irrigation Authority. The power generation component is privatized and operated by Aboitiz Inc.

As of 1pm of Nov 12, Magat Dam in Isabela, had seven gates open at 13 meters.

Municipalities of Ramon, San Mateo, Aurora, Cabatuan, Luna, Reina Mercedes, Burgos, Naguilian and Gamu in Isabela affected by Magat’s release.

November 13 - Water at the Lower Cagayan River rose to a new record-high level in the aftermath of Typhoon Ulysses. Lower Cagayan River is the downstream portion of the Cagayan River.

This caused instant flooding in communities near the waterway and its tributaries that include the Pinacanauan de Tuguegarao, Chico, Pared, and Dummun Rivers.

The river's water level in Tuguegarao City rose to 12.7 meters -- surpassing the 11-meter high critical level and equaling its 2010 record water elevation.

The inundation of the Cagayan River and its tributaries have caused great loss of life and property and substantial losses to the local and national economies.

November 13 - Water at the Lower Cagayan River rose to a new record-high level in the aftermath of Typhoon Ulysses. Lower Cagayan River is the downstream portion of the Cagayan River. This caused instant flooding in communities near the waterway and its tributaries.

The river's water level in Tuguegarao City rose to 12.7 meters -- surpassing the 11-meter high critical level and equaling its 2010 record water elevation.

The water level rose further as Cagayan River continues receiving excess water from Magat Dam and runoff from Sierra Madre and Cordillera mountain ranges. The water rose rapidly, instantly flooding many towns and villages.

November 14 - Even before dawn Saturday, Cagayan and Isabela residents begged for rescue while trapped on rooftops amid surrounding floods. The volume of water that washed down towns was enormous, with the massive flooding described as worst in decades.