Monsoon Rains to Bring Flood and Landslide Risks Across Luzon

According to PAGASA in its weather bulletin issued at 4:00 AM on June 4, 2026, the Southwest Monsoon is bringing occasional moderate to heavy rains across Northern Luzon, Central Luzon, and western Southern Luzon, posing immediate threats of flash floods and landslides. The weather bureau warned that these monsoon rains, locally known as Habagat, will affect multiple provinces throughout the day, accompanied by moderate to strong winds and rough coastal conditions.

In La Union, residents in low-lying communities and mountainous areas are advised to take precautions against sudden flooding and soil instability. Localized impacts of the monsoon are expected to be felt across coastal towns such as San Juan, Bauang, and the capital city of San Fernando, where heavy downpours could disrupt daily activities.

The state weather bureau also reported that coastal waters in Northern Luzon will experience moderate to rough seas, with wave heights reaching between 1.2 to 3.1 meters. Local fisherfolk and small seacraft operators in La Union’s coastal areas are urged to avoid venturing out into the sea due to strong southwest winds.

Other areas in the Ilocos Region, alongside Zambales, Bataan, Tarlac, and Pampanga, will also experience similar occasional rains. Meanwhile, Metro Manila and the rest of Central Luzon will face cloudy skies with scattered rainshowers and thunderstorms.

The public is advised to monitor local disaster risk reduction and management office updates for real-time evacuation alerts and safety advisories. PAGASA will continue to monitor the monsoon’s movement and issue subsequent weather updates as conditions develop.

Temperature and humidity data from PAGASA’s Diliman station recorded a high of 31.5°C and low of 25.3°C yesterday, with humidity peaking at 95% in the morning.

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SOURCE: PAGASA