The National Weather Service issued a Severe Extreme Heat Warning on June 13, 2026 at 11:34 for multiple areas of Northern California, remaining in effect until June 16, 2026 at 23:00. The alert covers parts of Shasta, Tehama, Butte and adjacent Sierra Nevada foothills, where daytime highs could reach 110°F and overnight lows remain in the 70s.
The warning matters because persistent heat with limited nighttime relief increases the risk of heat illness across communities, including sensitive groups like older adults, children, outdoor workers and those without access to cooling. Forecasters indicate a widespread Major HeatRisk meaning hot daytime temperatures could drive broad health impacts and strain cooling resources. Last update: June 14, 2026.
Areas under warning across Shasta, Tehama, Butte and foothills
The affected zones include Western Shasta County, South-Central Shasta County (including the Redding metro) Eastern Shasta County, the Northern Sacramento Valley in Tehama County, Tehama County more broadly, Western Tehama County and its foothills between 1,000–3,000 feet, plus Western Shasta County foothills in the same elevation band. In Butte County, areas below 1,000 feet are included, as well as the Sierra Nevada of Tehama–Butte–Plumas Counties between 1,000–3,000 feet. These locations combine valley heat with elevated terrain where downslope warming can intensify temperature extremes.
Timing and forecast details through June 16
The warning is continuous from June 13, 2026 at 11:34 through June 16, 2026 at 23:00, covering the peak of the heat episode. Forecasts call for widespread highs near 110°F in lower elevations and warm nights in the 70s, limiting recovery. The sustained heat supports a cumulative stress effect, raising the probability of heat cramps, heat exhaustion or heat stroke for individuals exposed for long durations, particularly where air conditioning is unavailable or limited.
Authorities advise drinking plenty of fluids, staying in air-conditioned spaces when possible and limiting strenuous outdoor activity to early morning or evening. Lightweight, loose-fitting clothing can reduce heat load, and checking on relatives and neighbors—especially those more vulnerable to heat—remains essential. In an emergency, dial 911. Residents are encouraged to follow guidance from local officials and the National Weather Service monitor symptoms of heat illness and use community cooling options if home cooling is inadequate.
