Biliran is compact, mountainous, and ringed by a narrow coastal strip. Slope and fast water are the main things to screen.
Biliran is a small island province just north of Leyte, connected by a bridge. It is volcanic in origin, which means the interior is steep and the population lives on a narrow coastal shelf around the edge.
Naval, Caibiran, Almeria, Kawayan, Biliran town and Cabucgayan all sit in that ring.
The island rises quickly from the shore. Rivers are short and steep, and the ground above the coastal strip is genuinely mountainous.
For any address, read together:
In 2017, Tropical Depression Urduja brought heavy rain to Biliran and caused deadly landslides and debris flows across the island. It was, by category, a weak system. That is the recurring point: category measures wind, and rain on steep saturated ground is a separate problem. See the LPA to super typhoon ladder.
Almost everyone lives near the water. Screen mapped storm surge exposure against elevation for any coastal address, and screen flood susceptibility separately, because rain and surge are different maps.
The strip is narrow, which means the same lot can carry coastal exposure in front and slope exposure behind. Both need answering.
Biliran has geothermal activity and volcanic terrain. Check the distance to the nearest mapped volcano at your coordinates, and check the current PHIVOLCS status yourself, because alert levels change and a screening reports a distance rather than a status. See the volcanic proximity brief.
Volcanic soils on steep slopes are also, as a class, prone to failure when saturated. That is a geotechnical question for a licensed engineer, not a map reading.
Biliran's circumferential road runs through cut slopes and across many short crossings. A single failure isolates a section, and in 2017 several sections were cut at once.
Drive the route to the bridge and to the nearest hospital. Count the crossings and the cuts. Ask which section goes first. See the house is fine, the road is not.
Water supply, power reliability, hospital access, and the bridge itself are all part of what you are buying. Ask how long outages last after a storm, and what happens when the bridge or the road is closed.
A hazard screening reads public national datasets at a point and reports mapped susceptibility, elevation, slope, and distances. On smaller islands some community-mapped layers are thinner. It cannot assess the slope above your lot, judge a retaining wall, or measure volcanic soil at depth, and PHIVOLCS is the authority on volcanic status.
CheckHazard does not replace a professional geotechnical or engineering survey.