The hikers were a father and daughter lost in Canyonlands and a woman who passed out at Snow Canyon state park

Three hikers died over the weekend in suspected heat-related cases at state and national parks in Utah, including a father and daughter who got lost on a strenuous hike in Canyonlands national park in triple-digit temperatures.

The daughter, 23, and her father, 52, sent a 911 text alerting dispatchers that they were lost and had run out of water while hiking the 8.1-mile (13km) Syncline Loop, described by the National Park Service as the most challenging trail in the Island in the Sky district of the south-east Utah park.

The pair set out on Friday to navigate steep switchbacks and scramble through boulder fields with limited trail markers as the air temperature surpassed 100F (38C).