The suspect, identified as 30-year-old Trennon Smith, was arrested on charges of first-degree arson and reckless burning in Oregon, authorities said.
Hundreds of the iconic, larger-than-life sequoias in Yosemite National Park are under threat as the Washburn Fire continues to burn.
The move affects more than 16,000 firefighters and comes as much of the West braces for a difficult wildfire season.
Red flag warnings of critical fire conditions were issued by the National Weather Service in eight states.
A vineyard in Oregon practices grazing-based viticulture, using animals to help improve their wine and protect the farm from wildfires.
New Mexico Gov. Michelle Lujan Grisham is asking President Joe Biden to declare a disaster as firefighters scramble to clear brush, build fire lines and spray water to keep the largest blaze burning in the U.S. from destroying more homes.
Officials said the so-called NCAR Fire has burned more than 120 acres but the combination of dry brush and winds could cause the blaze to continue to grow.