Weekend Grand Canyon hiker death was third at park in last month

Deaths have occurred as officials warn visitors that trail temperatures can soar to 120F - in the shade

A man died while hiking the Grand Canyon over the weekend, bringing the number of deaths at the popular national park in Arizona over the last month to three, according to officials.

Causes of death had not been publicly released for any of the hikers as of Wednesday. But the deaths occurred as much of the US this summer has dealt with extreme heat connected to the climate emergency which experts say the burning of fossil fuels has spurred - and as authorities at the Grand Canyon warn visitors that temperatures on the park's trails can soar to 120F (48.9C) in the shade.