What caused the severe flooding and landslides in the northern Philippines?

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Severe Flooding and Landslides in the Northern Philippines Linked to Intense Rainfall and Tropical Storms

At least 13 people have died in the northern Philippines due to severe flooding and landslides, primarily caused by a nine-day period of intense rainfall that in some areas exceeded a month's average, a situation exacerbated by the presence of tropical storms. This extreme weather event led to significant disruptions, including the closure of schools and government offices across Luzon and widespread flooding in Manila.
Impact of Exacerbated Rainfall

The region experienced rainfall totals significantly above average. In Baguio, the accumulated rainfall from August 1 to August 9 reached 1,413.2 millimetres, far exceeding the typical August rainfall of 963.2 millimetres. This intense downpour, described as 47 percent higher than normal for the entire month, contributed to a devastating landslide in Baguio where a rain-soaked mountainside collapsed onto several houses, resulting in the deaths of four residents and leaving at least six others missing. Elsewhere on Luzon, landslides claimed another six lives, with additional fatalities reported from drowning, being struck by a falling tree, and electrocution.
Role of Tropical Storms

The severity of the rainfall was compounded by tropical storms. These storms intensified the already heavy precipitation, pushing weather systems beyond typical patterns. While floodwaters were reported to be receding by Monday evening, the immediate aftermath saw widespread inundation, with parts of Metro Manila recording rainfall equivalent to approximately 90 percent of a typical August.
Broader Context of Extreme Weather Events

The Philippines, situated within the Pacific cyclone belt, is highly susceptible to an average of 20 storms and typhoons annually, which impacts millions living in disaster-prone zones. Scientists generally attribute the increasing frequency, duration, and intensity of extreme weather events, such as the recent heavy rains, to human-driven climate change. Addressing the underlying issues of flood mitigation, as noted by the Public Works Secretary, is also a critical factor in managing the impact of such events.

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What caused the severe flooding and landslides in the northern Philippines?

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