Firefighters in California are struggling to gain control of a huge wildfire which has reached the edge of Yosemite National Park.

Known as the Rim Fire, it covers an area of nearly 203 sq miles (526 sq km) and threatens a major reservoir serving San Francisco.

The fire is now 7% contained, officials say, up from 2% on Friday.  However, officials say strong winds could hamper efforts to control the blaze further.

The fire is 7% contained, officials say

More than 5,000 homes are endangered by the blaze, which began on 17 August in the Stanislaus National Forest.  More than 2,700 firefighters are tackling the flames in difficult terrain.

Evacuations, some voluntary and some mandatory, are taking place. Despite the threat to thousands of homes, only a few have been destroyed.

(Source: BBC)