Heat advisory issued for Boise area as temperature stays hot. Who’s most at risk?
After days of scorching temperatures, weather in the Boise area is far from cooling down.
The National Weather Service issued a heat advisory on Monday, July 13.
“High pressure over the Mountain West will continue warm and dry conditions across the state,” the National Weather Service warned in the most current Idaho state forecast discussion.
“Monsoonal moisture” will thunder through Boise on Monday and Tuesday, July 14, the weather service said.
Here’s what the heat advisory means for the City of Trees:
How long is heat advisory in effect for Boise area?
According to the National Weather Service, the heat advisory will remain in effect across the Treasure Valley from 2 to 9 p.m. on Monday.
Cities impacted by the advisory include Boise, Caldwell and Nampa.
Nyssa and Ontario in eastern Oregon will also be affected.
“Temperatures up to 101 (are) expected,” the weather service said.
Who is the most at risk in extreme heat?
“Hot temperatures may cause heat illnesses, especially for the young, elderly and animals,” the National Weather Service said in the advisory.
When hot weather starts to raise your body temperature, you may experience illnesses including heatstroke, heat stresses or heat exhaustion, according to the U.S. Centers for Disease Control and Prevention.
“To keep you and those around you safe during an extreme heat event, it is crucial to be aware of the signs of heat-related illnesses and take appropriate action,” the Idaho Office of Emergency Management said on its website.
“Vulnerable populations such as older adults, infants, children and individuals with pre-existing health conditions face the highest risks during such events,” the state agency added.
How can I prevent heat illnesses?
To stay safe, the National Weather Service said, you should “drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check up on relatives and neighbors.”
If you are heading outside, “take extra precautions,” the weather service said.
Wear loose, lightweight clothing, take regular breaks in the shade or air conditioning and stay hydrated, forecasters said.
What are best ways to protect myself from the heat?
The National Weather Service heat advisory cautions that “strenuous activities” should be kept to the morning or evening, when temperatures are cooler.
Protection from ultraviolet radiation is a must for Idaho residents.
“In the Gem State, there is an increased risk of developing skin cancer because of our outdoor lifestyle, higher elevation and sunburn frequency due to distinct seasons,” Your Health Idaho, the Gem State health insurance marketplace, said.
Lather up in a broad-spectrum sunscreen of SPF 30 or higher before you head outside and consider keeping your skin covered with lightweight materials.
“The best protection from the sun and heat is repeated application of broad-spectrum sunscreens, protective clothing, sunglasses, and hats,” Your Health Idaho said.
If you need a spot to cool off while you’re out and about, plan a trip to Roaring Springs Waterpark in Meridian or one of Boise’s many public pools, splash pads and cooling misters.
This story was originally published July 13, 2026 at 3:06 PM.
