Early warning means in meteorology They are generally reliable in predicting natural disasters. Specialists have developed technologies that accurately model the behaviour of air masses, and have at their disposal very complete data obtained from different sources covering the entire surface of the globe.
Among these sources are the weather satellites which continuously disseminate data and images on the position and movement of air masses over the continents and oceans. In addition, we have a dense network of land and sea stations that continuously collect information on various meteorological elements related to the lower layers of the atmosphere.
These observations, both space-based and terrestrial, connected to an efficient telecommunications system, make it possible to compile local forecasts and organize them into a global system. This system has the capacity to predict extreme phenomena in advance so that they can be implemented. preventive measures to minimize the damage.
Thanks to weather forecasts, it is possible to be aware of disturbances that, due to their intensity and frequency, could cause disasters. The weather radars On land, they play a key role here, as they can detect the location and intensity of rainfall with great precision. This data is vital as it allows monitoring the flow of water courses and preventing overflows through early warning.
Currently, most countries have topographic data over watercourses and hydrological basins, which facilitates the prediction of water behaviour based on rainfall volume. However, there is still room for error in some cases due to lack of precision or poor timely interpretation of the data.
A notable case was the Hurricane Katrina, where despite weather warnings, authorities failed to take adequate preventative measures, resulting in a major catastrophe.
Volcanic eruptions
Volcanic eruptions are usually easier to predict than other natural disasters. This is due to the presence of several physical and chemical phenomena accompanying waves that can be monitored individually. Among the clearest signs are intense seismic activity and the dilation of the Earth's crust, which indicates an increase in internal pressure.
When a volcano goes from being inactive to active, it is possible to detect it in time thanks to seismic sensors that constantly monitor activity beneath the surface.
As the lava advances towards the surface, the ground tends to ignite, which is accompanied by the release of gases. These phenomena generate small alterations in the gravitational field and in the Earth's magnetic field, which are also detectable by scientific instruments.
Monitoring these driving phenomena of volcanic eruptions is crucial. detection instruments More advanced ones are responsible for analyzing gas emissions, recording variations in soil composition and measuring changes in the magnetic and gravitational fields.
However, predicting an eruption in the short term remains a challenge. The closer the lava gets to the surface, the more difficult it becomes to accurately delineate its effects. In addition, the area potentially affected is shrinking, requiring an ever-increasing number of instruments to properly monitor events at a local level.
Short-term forecasts are therefore scarce and unreliable, as there are no sensors and instruments that cover all the active volcanoes around the world.
To mitigate the effects of an explosive and dangerous volcanic eruption, the most effective solution would be to evacuate a sufficiently large area around the volcano and establish a no-entry zone. Although this seems the most prudent option, in practice, logistical and socio-economic difficulties often make it unfeasible.
Preventive measures and family preparation
In addition to efforts to predict volcanic eruptions and other natural disasters, preventive measures play a crucial role. Preparing in advance can make the difference between life and death in many cases. Here are some key tips for preventing natural disasters:
- Involve the whole family in creating a emergency plan for the different types of natural disasters that could occur in your area. Simulate different scenarios to be better prepared.
- Identify safe meeting points, both inside and outside the home, and make sure all family members know them.
- Prepare a emergency kit with basic supplies such as water, non-perishable food, tools, medications, flashlights and batteries. This kit should be in an accessible location at all times.
- Make sure you have access to reliable sources of information—such as battery-powered radios—to stay up to date with the latest weather updates.
Participating in drills and teaching children how to react to different types of natural disasters can be essential. It is also advisable to have a list of emergency numbers and designate a family member outside the risk zone as a point of contact.
Natural disasters are events that we cannot control, but adequate preparation at the family level and at the level of authorities and governments can significantly reduce the impact that these phenomena have on people and communities.