Southeast Nebraska remains under an Extreme Heat Warning through 9 p.m. Sunday, with dangerously high temperatures and heat index values expected to reach 110 to 112 degrees in Lincoln. A Heat Advisory will then remain in effect through 10 p.m. Monday, as another day of dangerous heat is forecast.
According to the National Weather Service in Omaha/Valley, the prolonged heat event poses a significant risk for heat-related illness, especially because overnight temperatures will only fall into the upper 70s, providing little opportunity for recovery. The agency says heat illness becomes increasingly common during multi-day stretches of extreme heat and urges residents to stay hydrated, spend time in air-conditioned buildings, and limit strenuous outdoor activities to the early morning or evening hours.
The National Weather Service’s decision support briefing indicates heat index values across eastern Nebraska could peak between 105 and 115 degrees today and Monday, with isolated locations approaching 118 degrees. Forecast confidence in the dangerous heat remains high. Sunday morning’s details are available here 7-26-26 NWS AM DssPacket
7-26-26 NWS
Forecasters are also monitoring the potential for strong to severe thunderstorms late Sunday afternoon and evening. The National Weather Service says there is a 20 to 30 percent chance of thunderstorms developing after 4 p.m. If storms form, the primary threat will be damaging straight-line winds, with isolated gusts exceeding 75 mph. Large hail is also possible.
The 10/11 Weather Team also expects dangerous heat to continue through Monday before a noticeable cooldown arrives Tuesday, with highs returning to the upper 80s and lower 90s and additional chances for scattered thunderstorms later in the week.
Officials recommend:
- Drink plenty of water, even if you don’t feel thirsty.
- Take frequent breaks if working outdoors.
- Check on older adults, young children, and anyone without adequate air conditioning.
- Never leave children or pets unattended in vehicles.
- Have multiple ways to receive weather warnings in case severe storms develop Sunday evening.
The National Weather Service says the combination of extreme heat and overnight warmth makes this one of the most hazardous heat events of the summer, and residents should take precautions until cooler weather arrives early this week.