The weather system hit land on Monday night, prompting the forced evacuation of thousands of residents and cancellation of hundreds of flights.
Tens of thousands of people fled their homes in high-risk areas ahead of the category 5 storm's arrival due to major flooding and landslide risks.
Jaish al Islam opposition group will put down heavy weapons and leave Douma town of the besieged enclave for northern Syria, according to regime media reports.
Eastern Ghouta was the opposition's final stronghold on the edge of Damascus, but beleaguered opposition groups are now left with less than 10 percent of their one-time bastion.
The new wildfire comes a day after France asked for Europe's help to tackle flames already raging in the tinder-dry south, including near the popular resort of Saint-Tropez.
Millions have been evacuated as heavy rains and winds lash the country's southeastern coast, prompting authorities to raise the weather warning to its highest level.
Freezing temperatures have slowed the evacuation of the last rebel-held sections of eastern Aleppo in recent days.
Seven-year-old Bana Alabed, whose tweets about her experiences of living in Aleppo went viral, and her family thanked President Recep Tayyip Erdogan for helping the children of Syria.
About 700 firefighters are battling to control the wildfire on a mountain pass which has already engulfed 6,070 hectares of terrain.
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