Columbia, S.C. – Relentless summer heat and a growing risk of thunderstorms threaten daily routines and summer travel across South Carolina on Sunday, July 20th. As temperatures surge toward 98°F in Columbia, drivers along I-26 and throughout the city should prepare for sudden storms after 2 p.m. and dangerous heat index values topping 105°. Limit outdoor activities and ensure vulnerable residents have access to air conditioning.
According to the National Weather Service, Sunday brings a slight chance of showers and thunderstorms in the afternoon, with heat indexes that could reach 107°F. High humidity and light winds offer little relief. Anyone working or exercising outside should drink plenty of water, take breaks in the shade, and avoid peak afternoon hours. Power demand will climb, so consider pre-cooling your home and charging mobile devices.
Thunderstorm chances continue into Monday, July 21st, with periods of heavy rain possible and local rainfall up to a half inch. Monday night could see more storms, so stay alert for potential power outages and hazardous driving. Tuesday and Wednesday remain hot, with highs near 91°F and the risk of more showers—perfect conditions for quick flooding on area roads.
Residents along I-20, I-26, and local school districts should monitor local alerts. Remember, pets and young children are especially at risk in extreme heat. Never leave anyone unattended in a parked car, even for a minute.
Warnings and advisories remain possible as this pattern continues through midweek. Stay tuned to local alerts for any changes.
Five-Day Weather Snapshot:
- Sunday, July 20th: Hot, high 98°F; afternoon storms possible; heat index up to 107°
- Monday: Chance of showers and thunderstorms after 2 p.m.; high 99°F
- Tuesday: Showers and storms likely; high near 91°F
- Wednesday: Chance of showers; high near 91°F
- Thursday: Mostly sunny, warm; high near 97°F
