Administrative procedures and services
Natural hazards
Natural hazards


It is in the West Indies that the seismic hazard is highest, being located at the subduction zone of the North American and South American plates under the Caribbean plate.
The magnitude measures the energy released by an earthquake and allows to evaluate its power. The power of an earthquake is also characterized by the length of the fault that comes into play. The more an earthquake releases energy and the more the fault yields over a long distance, the higher the magnitude.
The intensity measures the effects and damage of the earthquake in a given place: effects observed or felt by man.
An earthquake of very high magnitude can have a zero intensity when it takes place very far from any habitation.
The earthquake itself does not kill, it is the collapse of buildings, badly designed or poorly constructed, which can be accompanied by victims. The best prevention against this risk is therefore to build seismic.

Prevention and rescue booklet



Each year, prior to the start of the hurricane season, the Collectivité and the Prefecture organize preparatory meetings with all the services and actors concerned, in order to remind everyone of the different phases of the alert and to make an inventory of the means Implemented in the event of a major event.
Informed and sensitized by the media, the population applies the instructions of preparation and protection in case of threat or confirmation of threat (verification of material and alimentary reserves, preparation and protection of the home, withdrawal or stowage of any object that can transform into projectile).


INSTRUCTIONS IN CASE OF CYCLONE (Fr-En)
INSTRUCTIONS FOR YOUR STAY IN A SHELTER
Prevention and rescue booklet
INSTRUCTIONS FOR YOUR STAY IN A SHELTER
LIST OF CYCLONIC SHELTERS


A flood is a submersion, fast or slow, of an area usually out of water. Flooding is not unknown in some areas of Saint Martin.
The hydrographic network in our region is essentially composed of gullies that flow only during heavy rainfall, when the soils are saturated with water. Soil waterproofing (urban development) limits precipitation infiltration and increases runoff. In any urbanized area, the danger is to be carried away, isolated or drowned. Collective measures (maintenance and works) and individual measures (adaptation of constructions), taken and recommended, allow the considerable reduction of the damage caused by the floods.

Prevention and rescue booklet


Induced effects of earthquakes or high saturation of soils into water, land movements can be manifested by landslides, collapses or falls of rock blocks. The objective of reducing the hazard intensity (risk protection work) and therefore the vulnerability of the stakes (human and material), but in the In the case of large-scale movements, evacuation measures should be taken for your safety.

Prevention and rescue booklet


Tsunamis are a series of very long waves whose origin is most often the result of an earthquake, a volcanic eruption or a submarine landslide.
Our region can know 2 types of tsunamis: local, which can strike our coasts in a few minutes, and of distant or regional origin, which can touch us between a few tens of minutes and several hours, according to the remoteness of the source.
If the ground moves strongly and long under your feet, if you notice a sudden rise or fall of water or in case of alert by the authorities, a single slogan: go quickly to the heights!

Prevention and rescue booklet



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