Sequoias appear to be holding up during drought

Wendy Baxter climbs up a Sequoia tree to properly rig it before conducting drought research in Sequoia National Park.

Wendy Baxter climbs up a sequoia in Sequoia National Park.

Anthony Ambrose and Wendy Baxter use binoculars to inspect the integrity of a tree before they rig it with ropes to climb it.

Anthony Ambrose aims his crossbow to shoot a fishing line attached to a rod over a strong branch of a sequoia tree. The line is then replaced with rope.

Anthony Ambrose measures the diameter of the base of a sequoia.

Anthony Ambrose jots down measurement data.

After getting a thin rope up over a strong branch, Wendy Baxter helps Anthony Ambrose determine whether the rope is secured and safe to be climbed.

Anthony Ambrose climbs a tree after rigging it with a rope.

Anthony Ambrose during a climb.

Going up.

Anthony Ambrose climbs up a Sequoia tree after properly rigging it with a rope to conduct drought research in Sequoia National Park.

Looking down at the canopy in Sequoia National Park, as seen from a helmet-mounted camera.

A sequoia is viewed from a helmet-mounted camera.

A helmet-mounted camera is used to capture photos of a sequoia.

The view on top a 80-meter Sequoia tree, where a hole can be seen in the crown.