Vinaròs, in the province of Castellón, experienced this Sunday a very adverse meteorological episode, with a temperature of 40.4 ºC and gusts of wind of up to 97 km/h.
The phenomenon is linked to a warm burst, an episode capable of transforming weather conditions in just a few minutes. The temperature rises suddenly, humidity drops sharply, and wind appears with intense gusts, often in a context of dry storms or nearby convective activity.
What is a warm burst
A warm burst is a sudden and local meteorological phenomenon. It occurs when a descending air current, associated with a storm cloud or remnants of convective activity, descends to the surface and passes through layers of warm and dry air.
During that descent, the air reheats and dries even more. Upon reaching the ground, it expands forcefully and can cause very intense gusts of wind, accompanied by a sudden rise in temperature and a drop in relative humidity.
Why does the temperature rise so much
The key lies in the behavior of the air as it descends. When a mass of air descends from mid-levels of the atmosphere, it compresses due to the increase in pressure and heats up. If the environment is also dry, the evaporation of precipitation can reinforce the process and favor the air reaching the ground very hot.
That is why a warm burst can cause the temperature to skyrocket in a matter of minutes, even at night or at the end of the day. It is not a progressive rise like that of a normal hot day, but a sharp jump linked to a specific atmospheric dynamic.
Strong wind and added risk
The other characteristic element is the wind. In Vinaròs, the gusts have reached 97 km/h, an intensity capable of causing branch falls, dragging objects, problems on terraces, awnings and light elements, and occasional difficulties in circulation.
The risk increases because the phenomenon can appear suddenly. Unlike other more persistent wind episodes, the warm burst can concentrate in a short interval, with very rapid changes in temperature, humidity, and direction or intensity of the wind.
A dangerous phenomenon in the midst of fire season
The warm burst is especially concerning in summer and in areas with dry vegetation. The combination of extreme heat, very low humidity, and strong gusts can favor the spread of wildfires or complicate firefighting efforts if there are active fires nearby.
In such situations, any spark, cigarette butt, reckless use of machinery, or unauthorized fire can have serious consequences. Strong gusts can push the flames quickly and change the behavior of the fire in a matter of minutes.
It is not a simple heat wave
Although the warm burst produces very high temperatures, it should not be confused with a conventional heat wave. A heat wave is a broader and more persistent episode that affects large areas for several days. The warm burst, on the other hand, tends to be more local, sudden, and brief.
Its danger lies precisely in that abruptness. It can go from a hot but relatively stable environment to a situation of very strong wind, extreme heat, and pronounced dryness in a very short time.
What to do if a warm burst occurs
In the face of such an episode, it is advisable to seek refuge in a safe place, avoid staying under trees, remove or secure objects that may be blown away, and exercise extreme caution on the road, especially if traveling with motorcycles, bicycles, caravans, or tall vehicles.
It is also recommended to close awnings, secure windows, and not engage in outdoor activities that may be affected by violent gusts. If the phenomenon coincides with storms, it is also necessary to follow the indications of Civil Protection and emergency services.
Vinaròs, under a very adverse meteorological episode
The case of Vinaròs summarizes well the nature of the warm burst: a very rapid change in weather, with extreme temperature and sudden wind. The 40.4 ºC and gusts of 97 km/h show to what extent these episodes can be intense, although their duration is limited.
The recommendation for the coming hours is to follow the information from AEMET, consult updated warnings, and avoid risky behaviors, especially in areas exposed to the wind, forested areas, and open spaces.