National Park Service, Grand Canyon

OutsideJul 3

Hiking during a heat advisory is dangerous. Outside editor Madison Dapcevich shares the essential gear and safety hacks that kept her crew safe.

Says hottest temps are 10 AM to 4 PM.

13 things in this story

Havasupai FallsSightA new early-access process allows people willing to pay an additional fee to apply for permits ten days earlier than…
Bright Angel TrailTrailTeenager died from heat illness on this trail.
Sawyer Squeeze FilterPlaceUsed for filling water at camp.
MSR TrailShot Pocket-Sized FilterPlaceUsed for pumping water on the trail.
National Park ServicePlaceSays hottest temps are 10 AM to 4 PM.
Kafka Kool TiePlaceAbsorbs water, cools carotid arteries.
PlatypusPlaceOur top-of-the-line,taste-free hydration reservoir with our highest-flow HyFlo Bite Valve, low-profile shape and…
National Weather ServicePlaceA significant heat wave is underway for the Intermountain West, Northern Plains, and Upper Great Lakes, peaking in…
Cedars-SinaiPlaceSome common medical issues, even when well controlled, can flare up in the sun and heat.
Eno ProFly Sil Rain TarpPlaceUsed to add extra shade at camp.
Centers for Disease Control and PreventionPlaceWarns heat stroke can strike within 15 minutes.
American Hiking AssociationPlace
North Face Light RangePlace

National Park Service