How did the fire in Hawaii come about?

The fire in Hawaii, USA is caused by drought, strong wind, flammable vegetation and insufficient local fire prevention measures.

1, drought

Although the Hawaiian Islands are located in the middle of the Pacific Ocean, it doesn't rain every year. In recent years, in the hot summer, droughts often occur here, and the drought situation has been very serious since August this year. This may be due to climate change. In August this year, there was a rare drought in the history of the islands. In many places, the surface vegetation dries up rapidly at high temperature, and the wind burning effect often appears in summer. Once there is a flame, it is easy to form a mountain fire.

2. Strong wind

As the saying goes, fire depends on wind, and wind helps fire. The fire in Hawaii is related to strong winds. Hurricane Dora, which traveled westward from the East Pacific through the international international date line, just passed through southern Hawaii, and the strong winds around it greatly contributed to the fire on Maui, making it difficult to control it.

3. Flammable plants

In recent years, due to the invasion of alien species in Hawaii Island, the local vegetation is very lush, so this dry weather combined with the burning mountain fire baking, these vegetation become flammable, which is fueled by the wind.

4. The local fire prevention measures are insufficient.

The reason for the huge scale and heavy losses of this fire can not be completely attributed to the mountain fire, but also has a lot to do with the local failure to do a good job in fire alarm and effective fire fighting. A fairly perfect alarm system in the local area is equivalent to a dead letter; Local residents failed to cope with the fire well and had no time to escape and save themselves; However, the fire department underestimated the severity of the mountain fire, did not know where to put out the fire, and did not know how to put out the fire systematically, which magnified the disaster losses and greatly increased the casualties.

Strategies and tactics for fighting forest fires;

1, determine the main fire zone.

According to the degree of fire threat, the fire site is divided into unrestricted advancing area and restricted advancing area. There is no natural or artificial fire barrier outside the fire boundary, which is an unrestricted advance area. The fire here is free to spread, so it should be identified as the main fire extinguishing area to control its fire. Restricted advance zone refers to an area where there is a natural or artificial fire barrier outside the fire boundary, and the fire is not easy to expand. After controlling the fire in the unrestricted advance area, the local fire can be put out.

Seize the opportunity and put it out quickly.

Small fires and fires that have just happened, fires with small winds, headwinds and changes in wind direction, fires with high air humidity, light rain and foggy weather; It is easier to put out fires in downhill (sitting on fire), dense forests and water wetlands; At night, the wind is small, the temperature is low, the humidity is high, and the fire is generally weak. Grasping these favorable opportunities and fighting quickly can save a lot of manpower and material resources and reduce forest losses.

3. Sacrifice part to save the whole situation.

In the case of limited manpower and material resources for fire fighting, in order to preserve more or more valuable forests, some secondary forests with lower values can be sacrificed. If there is a fire between artificial forest, primary forest, secondary forest and grassland, we can temporarily abandon the secondary forest and grassland and concentrate on preserving the artificial forest and primary forest. When putting out the fire, try to put out the fire outside the fire site first, and then put out the fire inside the fire site after it is controlled.

4, thoroughly clean up the fire, eliminate hidden dangers.

After the fire is put out, if the fire site is not completely cleaned, the residual fires such as tree roots, dead standing trees, diseased rotten trees, fallen trees and treads are not put out, and will rekindle when encountering strong winds, triggering new fires. Therefore, the fire source must be thoroughly checked and eliminated. After the fire is cleaned up, it will not be possible to evacuate the fire until noon when the wind blows and the sun shines. However, people still need to be guarded, and after confirming that the fire will not rekindle, all of them will be evacuated.