Bayombong, Solano, Bambang and the Magat valley sit between the Caraballo and the Sierra Madre. Here is what to screen at an exact address.
Nueva Vizcaya is a valley province. The Magat River runs through it, mountains rise on both sides, and the population sits mostly on the valley floor and the terraces above it.
There is no coast here, which removes storm surge from the list. Everything else is very much present, and the valley shape concentrates it.
Bayombong, Solano, Bambang, Aritao and the towns along the Magat sit on ground the river built. Flat valley floor next to a river is floodplain by definition.
Screen these together for any lowland address:
Tributary creeks in a valley province deserve particular attention. They are short and steep on the way down and they arrive at the flat with force and material.
The Caraballo range to the south and the Sierra Madre to the east frame the province, and there is high ground in most directions. Upland barangays, roadside lots on cut slopes, and terraces above the valley floor all carry slope questions.
Read slope with mapped landslide susceptibility, and inspect any cut slope or retaining wall physically. The checklist is in retaining walls.
Where a steep tributary valley opens onto the flat, check the debris flow and alluvial fan flags. That fan of level, well-drained ground at a valley mouth is convenient, and it is convenient because material has been delivered there. See the debris flow and alluvial fan brief.
Magat Dam sits at the boundary between Isabela and Ifugao and its releases affect the Cagayan River system downstream. Nueva Vizcaya sits upstream of the reservoir on the Magat's headwaters, which is a different position from the downstream provinces, and it is still worth understanding how the system is operated.
A hazard screening does not model dam releases. If your property is anywhere near a major river influenced by a dam, ask the operating agency and the provincial disaster office directly how release warnings are issued and who receives them. The general version is in living downstream of a dam.
The Pan-Philippine Highway through Dalton Pass is the main link to the lowlands, and it is a mountain road that closes for landslides. That is a real feature of living here and it belongs in your assessment.
Ask how often the route closes, how long it typically takes to reopen, and what the alternative is. See the house is fine, the road is not.
Valley provinces often have older settlement on higher terraces and newer development on the flat, because the flat was left alone for a reason. If the long-established part of town is up a level from the new subdivisions, that is not an accident, and it is worth asking about directly.
A hazard screening reads public national datasets at a point and reports mapped susceptibility, elevation, slope, and distances. It does not model dam operations, assess a retaining wall, or measure soil at depth. Those belong to the operating agency, the provincial disaster office, and a licensed geotechnical engineer.
CheckHazard does not replace a professional geotechnical or engineering survey.