The two-weeks old Wallow Fire in Arizona has so far burned nearly 190,000 hectares and destroyed 32 homes and four rental cabins, marking the state's largest wildfire ever.

Hundreds of people remain under evacuation orders close to the border of Arizona and New Mexico, while firefighters battle with the blaze. The fire was 20% contained as of Tuesday night.

The huge blaze in Arizona was made worse by the extremely thick forest, the result of a century of fire suppression which has let more trees grow in the world's largest ponderosa pine forest. Fires which once scorched only grasses and small trees on the forest floor now reach into the crowns and skip across miles of terrain through the treetops. Forests across the West have similar problems, the Belfast Telegraph reported.
Fires also grew in New Mexico and at the state's border with Colorado, where a busy interstate highway was closed.

The wildfire outlook issued by the National Inter-agency Fire Centre in Boise, Idaho, issued the wildfire outlook, warning above-normal fire potential in the South West until September.

Two people of interest are being investigated for the cause of the Wallow Fire, which is thought to have been sparked by an abandoned campfire.

Elks run into the woods on the eastern edge of the Wallow Wildfire outside Alpine
Elks run into the woods on the eastern edge of the Wallow Wildfire outside Alpine, Arizona near the state border west of the town of Luna, New Mexico June 14, 2011. The wildfire that has roared out of control for more than two weeks through the pine forests of eastern Arizona set a record on Tuesday as the largest in state history, having consumed over 469,000 acres. REUTERS
Smoke from the Wallow Wildfire obscures the sun at a road check point west of the Reserve, New Mexico
Smoke from the Wallow Wildfire obscures the sun at a road check point west of the Reserve, New Mexico June 13, 2011. The fire has blacked 336,000 acres (136,000 hectares), making it the second largest forest fire on record in Arizona, as it cut through the popular mountain retreat of Greer in the eastern part of the state. REUTERS
Wildland firefighters go over maps of the Wallow Wildfire as the sun sets in Luna, New Mexico
Wildland firefighters go over maps of the Wallow Wildfire as the sun sets in Luna, New Mexico June 14, 2011. The wildfire that has roared out of control for more than two weeks through the pine forests of eastern Arizona set a record on Tuesday as the largest in state history, having consumed over 469,000 acres. REUTERS
Wildland firefighters work at a hot spot on the eastern edge of the Wallow Wildfire outside Alpine
Wildland firefighters work at a hot spot on the eastern edge of the Wallow Wildfire outside Alpine, Arizona near the state border west of the town of Luna, New Mexico June 14, 2011. The wildfire that has roared out of control for more than two weeks through the pine forests of eastern Arizona set a record on Tuesday as the largest in state history, having consumed over 469,000 acres. REUTERS
A log smolders on the eastern edge of the Wallow Wildfire outside Alpine, Arizona near the state border west of the town of Luna, New Mexico
A log smolders on the eastern edge of the Wallow Wildfire outside Alpine, Arizona near the state border west of the town of Luna, New Mexico June 12, 2011. Forest fire crews along the Arizona-New Mexico border braced for another day of high winds and low humidity on Sunday, battling the monster blaze that has forced as many as 10,000 people from their homes and charred 680 square miles. REUTERS
A heavy helicopter returns to Luna Lake after dropping water on a flair up north of the lake, on the eastern edge of the Wallow Wildfire outside Alpine
A heavy helicopter returns to Luna Lake after dropping water on a flair up north of the lake, on the eastern edge of the Wallow Wildfire outside Alpine, Arizona near the state border west of the town of Luna, New Mexico June 13, 2011. The fire has blacked 336,000 acres(136,000 hectares), making it the second largest forest fire on record in Arizona, as it cut through the popular mountain retreat of Greer in the eastern part of the state. REUTERS
The sun sets over a smoldering tree on the eastern edge of the Wallow Wildfire outside Alpine, Arizona
The sun sets over a smoldering tree on the eastern edge of the Wallow Wildfire outside Alpine, Arizona near the state border west of the town of Luna, New Mexico June 14, 2011. The wildfire that has roared out of control for more than two weeks through the pine forests of eastern Arizona set a record on Tuesday as the largest in state history, having consumed over 469,000 acres. REUTERS
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