US wildfire spreads towards San Francisco water supply
SAN FRANCISCO, California (AFP) - Firefighters reported progress Monday battling a huge blaze on the edge of Yosemite National Park, but warned it remains an "extreme" threat as it nears the top US tourist destination and San Francisco's water supply.
The Rim Fire, which began nine days ago, has grown to become the 13th largest in California's recorded history and has sparked the closure of one of the main roads into the spectacular natural beauty spot.
The fire has already crossed into the world-famous park, but it remains at least 15 miles from the Yosemite Valley, an area visited by millions of tourists each year looking to see stunning scenery, waterfalls and rock formations including Half Dome and El Capitan.
The inferno is also nearing the Hetch Hetchy Reservoir, the main source of fresh water for 2.6 million people living in the San Francisco Bay Area, some 320km to the west.