Red flag warning extended until Tuesday over heightened fire danger

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Vegetation fires break out in North, East Bay amid Red Flag conditions

A man using a lawn mower says his machine could have sparked dry brush nearby, leading to one of the fires. KTVU's Greg Liggins reports.

The National Weather Service extended a red flag warning to Tuesday evening for the North and East Bay hills and the East Bay valleys due to weather conditions that pose a risk of wildfires.

The warning was initially set to expire on Monday morning, but the weather service said conditions that include gusty north to northeast winds, low humidity and high temperatures would persist. 

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Busy weekend of fires is evidence of early season, says firefighters

KTVU's James Torrez reports.

The warning is now in effect through 6 pm. Tuesday.

The weather service urges people to properly dispose of cigarettes and matches, keep vehicles off of dry grass, avoid using any outdoor equipment that may create sparks, and to not drag tow chains.