From extreme heat in Grand Canyon and Death Valley to thermal burns in Yellowstone and volcanic hazards in Hawaiʻi Volcanoes, ...

Temperatures in Phoenix soared to 105 degrees on March 19, breaking the record of 97 for this date in 2017, according to the ...

Phoenix has seen several days with temperatures topping 100 degrees, and more extreme heat is expected through the weekend.

San Francisco and several Western cities are experiencing record-breaking March temperatures during an unusual heat wave ...

An unprecedented heat wave for the month of March is continuing to hold strong across the southwestern and western United ...

By Jeff Rose, PhDPeople experiencing unsheltered homelessness often navigate a treacherous world in which the choices ...

Rising heat is making everyday exercise harder, with modelling studies suggesting long-term impacts on activity levels and ...

After one of the warmest winters on record and a severely below-average snowpack, Southwest Colorado is heading into spring ...

The City of Tucson operates several cooling centers, including Parks and Recreation facilities and specially designated "COOLtainers," typically open from 12 p.m. - 4 p.m. during extreme heat. These ...

A record-shattering heat wave will bring triple-digit temperatures to the Valley over the next several days. Some tourist ...

Avalanche conditions west of Calgary continue to deteriorate, resulting in Friday’s brief closure of Banff Sunshine Village ...

This is the first story in a series on “climate gentrification” in Black neighborhoods. Support for this series was provided ...