In California, two major wildfires have sent nearly 8,000 people fleeing  from their homes to safety.

 About 4,000 people evacuated and 7,400 others were told to prepare to leave their homes as fire swept through grassy foothills in the Sierra Nevada, about 60 miles north of Sacramento, the California Department of Forestry and Fire Protection said Sunday.

The fire has burned nearly 4 square miles, injured four firefighters and destroyed at least 10 structures, but that number is expected to rise, fire spokeswoman Mary Ann Aldrich said.

The area burning was southeast of Oroville, where spillways in the nation's tallest dam began crumbling from heavy rains this winter and led to temporary evacuation orders for 200,000 residents downstream.

"It leaves you feeling like you can't catch a break," said Sharon Reitan, who sought shelter at an evacuation center with her boyfriend Sunday night.

They were in Oroville on Friday afternoon when the fire broke out and roads to their hillside home were blocked. They later saw photographs of their home burned to the ground.

One of the fires grew to 12 square miles, traversing a mountain range and heading south toward coastal Goleta.

In Nevada, fire officials have ordered evacuations for a wildfire that is near the same area where another blaze has already burned for days.

In British Columbia, firefighters were contending with more than 200 wildfires that had destroyed dozens of buildings, including several homes and two airport hangars. The three biggest fires, which ranged in size from five to eight square miles, forced thousands of people to flee.