More firefighting resources were being brought in Thursday to battle two forest fires that have shut down California's Sequoia National Park and threaten its ancient trees. A national interagency management team "equipped to handle the largest and highest-complexity emergency situations" was scheduled to take command of the firefighting effort, according to a statement from Sequoia and Kings Canyon national parks. The two fires were being managed collectively as the KNP Complex. Sequoia National Park has been closed and its headquarters and resident employees have been evacuated, along with a portion of the community of Three Rivers outside the entrance. The Colony and Paradise fires named for the areas where they started were ignited by lightning strikes last week and on Wednesday covered about 14 square miles (36 square kilometers) in California's rugged Sierra Nevada. The Colony Fire as of Wednesday was about a mile (1.6 kilometers) from Giant Forest, a grove of about 2,000 sequoias, according to Mark Ruggiero, fire information officer for the two national parks. Ground crew access to the Colony Fire was limited and the extreme steepness of the Paradise Fire terrain prevented any ground access, requiring extensive aerial water and retardant drops on both fires. The fires are among the latest in a long summer of blazes that have scorched more than 3,500 square miles (9,065 square kilometers) in California, destroying hundreds of homes. The park's historic wooden entrance sign dating to 1935 was covered in fire-resistant wrapping, and hoses were in place at the headquarters area for structure protection. More than 300 firefighters were on the lines, aided by helicopters and air tanker planes when smoke conditions allowed them to fly. Giant sequoias, some thousands of years old, grow on the western flank of the Sierra. They are adapted to fire, which can help them to thrive by releasing seeds from their cones and creating clearings that allow young sequoias to grow. But Ruggiero noted that the extraordinary intensity of fires in current climate conditions can overwhelm sequoias, a scenario that happened when the 2020 Castle Fire killed many trees in the region. Studies estimate that 7,500 to 10,600 large sequoias were killed by that fire, along with many of other sizes, according to the National Park Service. Subscribe to our YouTube channel: https://bit.ly/2TwO8Gm Subscribe to our newest channel Quicktake Explained: https://bit.ly/3iERrup Bloomberg Quicktake brings you live global news and original shows spanning business, technology, politics and culture. Make sense of the stories changing your business and your world. To watch complete coverage on Bloomberg Quicktake 24/7, visit http://www.bloomberg.com/qt/live, or watch on Apple TV, Roku, Samsung Smart TV, Fire TV and Android TV on the Bloomberg app. Have a story to tell? Fill out this survey for a chance to have it featured on Bloomberg Quicktake: https://cor.us/surveys/27AF30 Connect with us on… YouTube: https://www.youtube.com/user/Bloomberg Breaking News on YouTube: https://www.youtube.com/c/BloombergQuickTakeNews Twitter: https://twitter.com/quicktake Facebook: https://www.facebook.com/quicktake Instagram: https://www.instagram.com/quicktake