Extreme Weather Of The Week (PHOTOS)

This week was marked by a wildfire in Colorado that has challenged firefighters, as winds are expected to pick up over the weekend, according to the Associated Press. By Saturday, the blaze, which is burning southwest of Denver, was 70 percent contained. CNN reported Friday that firefighters were hoping to make progress before the weekend's expected high winds arrived.

A study published this week says extreme weather events "have increased and were 'very likely' caused by manmade global warming," reported Reuters. The study's authors wrote, "It is very likely that several of the unprecedented extremes of the past decade would not have occurred without anthropogenic global warming."

In Hawaii, Oahu set a record recently for the state's largest hailstone. The grapefruit-sized hailstone, which fell on March 9, measured "4.25 inches long, 2.25 inches tall and 2 inches wide," according to LiveScience.

New footage was released this week from the devastating tornadoes that tore through Indiana earlier this month. Click here to see surveillance video from a school bus at Henryville High School.

Sadly, It was revealed this week that farmers in Texas and Louisiana have been abandoning donkeys "by the hundreds" after the region's prolonged 2011 drought. According to AP, a rescue group in Texas says they've taken in almost 800 donkeys since March 2011.

Below, check out some of the week's wildest and most extreme weather photos from around the world.