Heat advisory: Big Bear Valley under heat warning through Monday evening

The National Weather Service in San Diego has issued a Heat Advisory for the San Bernardino County Mountains — including Big Bear Valley — running from 10 AM Saturday, August 22 through 8 PM Monday, August 24, 2026.[1]

Forecasters are warning of temperatures up to 95°F during the advisory window, with the primary concern being the risk of heat-related illness.[1] While those temperatures might seem mild by desert standards, they are well above normal for Big Bear's elevation and can pose a real danger, particularly for children, the elderly, and anyone spending extended time outdoors.

Residents are encouraged to stay hydrated, limit strenuous outdoor activity during peak afternoon hours, and check on neighbors who may be vulnerable. Information on local cooling centers or other community resources — should any be made available by county or local agencies — was not confirmed at the time of publication. Residents seeking assistance or up-to-date information are encouraged to check San Bernardino County's official channels or dial 211, a free community resource helpline.