Iowa-Illinois Weather Alert: Davenport Faces 105°F Heat Index as Thunderstorms Loom

DAVENPORT, Iowa – Residents in eastern Iowa and western Illinois are bracing for a scorching start to the week as the National Weather Service (NWS) issues a Heat Advisory for the Quad Cities region through 8 p.m. Sunday. Forecasters warn that heat index values could reach 105°F, making conditions dangerous for prolonged outdoor activity.

Sweltering Heat Grips the Region

Sunday’s weather will bring mostly sunny skies and highs near 92°F, but humidity and southerly winds will push the heat index well over the 100-degree mark. According to the NWS Quad Cities Office, overnight lows will stay warm, dropping only to about 71°F, offering little overnight relief.

Storms to Arrive Monday Afternoon

A shift is coming, however. On Monday, showers and thunderstorms are expected to develop in the afternoon, with a 50% chance of rain by nighttime. While the day will still be hot with highs in the low 90s and heat index values above 100°F, storms will gradually usher in cooler air.

Cooler Trend Begins Tuesday

Tuesday marks the beginning of a cooldown, with highs in the upper 80s, followed by more noticeable relief on Wednesday, when temperatures dip into the low 80s. The moderation in temperatures will continue into Thursday, offering a break from the recent stretch of intense heat.

Precautions Urged for Outdoor Workers and Travelers

Authorities are urging residents, especially those who work outside or travel frequently, to take precautions during this heat wave:

• Stay hydrated with water.
• Take frequent breaks in shaded areas.
• Avoid strenuous activity during peak afternoon hours.
• Check on vulnerable neighbors, especially the elderly or those without access to air conditioning.

If incoming storms strengthen early in the week, additional weather alerts may be issued to cover wind or lightning risks.

Five-Day Forecast for Davenport

• Sunday: Mostly sunny, high near 92°F, heat index up to 105°F, low 71°F
• Monday: Chance of storms after 1 p.m., high near 92°F, low 73°F
• Tuesday: Mostly sunny, high 87°F, low 67°F
• Wednesday: Mostly sunny, high 80°F, low 63°F
• Thursday: Mostly sunny, high 82°F, low 64°F

Have you taken the right precautions for this heat wave? Let us know how you’re staying cool or preparing for storms this week at ChicagoSuburbanFamily.com.