User:Yiyunn/sandbox

Growth and timeline
The wildfire season in Alberta in 2015 was unprecedented and began earlier than before. It started at March 1st and ended at October 31st. By May 21th, the wildfire hazard in the High Level Wildfire Management Area (HLWMA) was EXTREME. A fire restriction Startes in effect. As for July 10th, the wildfire hazard dropped because of rain. By October 31st, HLWMA had 333 wildfires and totaled 1773 wildfire recorded, which was such a large figure that only had been exceeded twice since 1990, with 491,802 hectares burned.

Cause and contributing factors
The major factors of the severe wildfire situation were weather condition, dead grass, wind and lightning. Due to the high temperature and lack of rain, areas with dead, dry grass were particularly flammable. Meanwhile, fire spread very quick with forest fuels in windy situation. Moreover, lightning deteriorated the situation.

Environment
The soil and tree roots burned need a long time to recover with complexly different species. There are ashes and deeply burned organic soils which has a high heat may smolder under snow, leading to another fire.