Alaska's First Heat Advisory Issued as Temperatures Soar

In an unprecedented move, the National Weather Service (NWS) has issued Alaska's first-ever heat advisory, signaling a significant shift in the state's approach to heat-related risks. The advisory, announced on June 13, 2025, pertains to Fairbanks, where temperatures are forecasted to exceed 85°F (29°C) on June 15.

Historically, the NWS addressed high temperatures in Alaska through "special weather statements." The transition to formal heat advisories aims to more effectively communicate the severity and potential dangers of elevated temperatures in a region unaccustomed to such events. Alekya Srinivasan, a meteorologist based in Fairbanks, emphasized the importance of this change, stating, "This is an important statement, and the public needs to know that there will be increasing temperatures, and they could be dangerous because Alaska is not used to high temperatures like these."

While Fairbanks has experienced temperatures reaching 90°F in the past, such heat is unusual for June. The new advisory format reflects an administrative update rather than unprecedented heat or a direct indication of climate change. Rick Thoman, a climate specialist at the Alaska Center for Climate Assessment and Policy, clarified the situation.

Alaska's unique infrastructure and environmental conditions make its residents particularly vulnerable during heatwaves. Many buildings are designed to retain heat, and air conditioning is not widespread. Additionally, frequent summer wildfires can prevent residents from ventilating their homes by opening windows. Thoman highlighted this challenge, noting, "If you have to have your windows closed for three days, you don't have air conditioning and your house is built to hold heat, pretty soon your indoor air temperature is higher than it is outside."

The decision to implement heat advisories in Alaska was announced in May 2025, with the NWS offices in Juneau and Fairbanks set to begin issuing these advisories starting June 1, 2025. The criteria for issuing a heat advisory vary by region:

• Interior (Fairbanks area): 85°F (29°C)
• North Slope: 75°F (24°C)
• Southeast (Juneau area): 80°F (27°C)

Unlike other regions, there is no duration criterion for these advisories; they are issued as long as the maximum forecast temperature meets or exceeds the threshold.

Historically, Alaska has experienced significant heat events. In July 2019, Anchorage reached an all-time high of 90°F (32°C), surpassing the previous record of 85°F (29°C) set in 1969. This heatwave was notable not only for its intensity but also for its duration, with Anchorage experiencing six consecutive days above 80°F (27°C).

The introduction of heat advisories in Alaska underscores a growing awareness of heat's impact in a state traditionally known for its cold climate. Buildings designed to retain heat and the lack of widespread air conditioning make residents particularly susceptible to heat-related illnesses. Furthermore, the combination of high temperatures and frequent wildfires can exacerbate health risks, as residents may be unable to ventilate their homes due to smoke.

While the advisory currently applies only to Fairbanks and Juneau areas, plans are underway to expand the system to Anchorage, pending appropriate temperature thresholds. This development reflects a proactive approach to public safety, acknowledging the unique challenges posed by heat in Alaska and the necessity for adaptive measures to protect its residents.