由于火势蔓延，须要立即采取行动。
借助高温和大风，火势迅速蔓延。
火势起来时，办公室人员惊慌逃出。
花了两个小时才控制住火势。
火势逐渐变得越来越大。火花四处飞溅。
The fire gradually got bigger and bigger. Sparks flew off in all directions.
一百多名消防队员仍在努力控制工厂火势。
More than a hundred firemen are still trying to contain the fire at the plant.
一辆装有化学品的卡车爆炸后火势迅速蔓延开来。
火势失控。
高温和干燥的条件使火势迅速蔓延。
The high temperatures and dry conditions make the fire spread quickly.
消防队员很快就将火势扑灭了。
幸运的是，一个邻居在火势蔓延之前赶来帮助他。
Luckily, one of the neighbors came to help him before the fire could spread.
火势炽盛。
火势很盛。
消防队员仍在尽力控制火势的蔓延。
直升机帮助救火人员控制住了火势。
消防员们说他们已控制住了火势。
已经向住在火势下风处的人们发出不要出门的警告。
Warnings were issued to people living downwind of the fire to stay indoors.
控制火势花了很长时间。
一天他正在竭力控制一座着火房子的火势。
One day he was trying his best to control the fire of a burning house.
主卧失火了，其中一人关上主卧的门以控制火势，减缓火势蔓延。
One of them closed the door to the master bedroom, where the fire started, controlling it and slowing its spread.
加州大火火势继续失控，旧金山附近的森林中的几个小镇仍处于危险之中。
Fires in California continue to burn out of control, and several small towns in the forests near San Francisco are still in danger.
环境变化会让火势变得糟糕么？
一名消防员在试图控制火势时牺牲。
其中一条靠岸的船上的油灯爆炸，火势迅速蔓延。
A lamp exploded in one of them near the shore and the fire speedily spread.
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