Charleston, July 30, 2025
News Summary
Charleston is on high alert as officials warn residents of impending coastal flooding due to a combination of high tides and heavy rainfall. With tide levels expected to reach 8.08 feet and rainfall predicted between 1-3 inches, particularly in downtown areas, residents in low-lying regions are advised to take precautions. The National Weather Service emphasizes the urgency of checking storm drains and avoiding risky situations as the city braces for these severe weather conditions.
Charleston Faces Increased Coastal Flooding Due to King Tides and Rising Sea Levels
Charleston is preparing for coastal flooding as city officials advise residents to remain vigilant due to an upcoming combination of high tide and heavy rainfall. A high tide is anticipated around 4 p.m. on Wednesday, coinciding with storm forecasts that predict 1-3 inches of rain across the region, particularly impacting downtown Charleston.
The National Weather Service has warned that these conditions may complicate after-work commutes, especially in the peninsula areas where heavy rain is expected to overlap with peak tide times. Residents living in low-lying areas are urged to take precautions and prepare for potential flooding.
To mitigate flooding impacts, community members are encouraged to check and clear storm drains if it is safe to do so and avoid driving through any standing water. The Charleston Harbor tide gauge has already recorded tide levels peaking at 8.08 feet, which is classified as a major flood stage. Similar flooding effects have been noted in nearby Mount Pleasant, highlighting the widespread challenges posed by the event.
Understanding King Tides
King Tides, a non-scientific term for Perigean spring tides, can reach levels of 7 feet or higher, especially during new or full moons. This year, tidal flooding has been intensified due to previous storms such as Tropical Storm Idalia. Residents are reminded that anticipated King Tide events in Charleston are scheduled to occur from April 26 to April 29, May 25 to May 27, October 7 to October 11, November 4 to November 9, and December 3 to December 6.
The South Carolina Department of Health and Environmental Control has urged residents to document these King Tide events while avoiding any hazardous situations that may arise during flooding.
Rising Sea Levels and Historical Data
Sea level rise is one of the significant factors contributing to the increasing frequency of coastal flooding in Charleston. Recent data indicates that South Carolina has seen a staggering 580.3% increase in coastal flood events, ranking the state third among 41 coastal states for such occurrences. Since 2015, Charleston has recorded 52 instances of tide levels exceeding eight feet, with 38 of those occurrences (which is 73%) having taken place in the past eight years.
Insurance experts recommend that residents consider obtaining flood insurance and retrofitting their homes with flood vents in an effort to mitigate potential flood damage. Coastal flooding has been a long-standing issue in Charleston, particularly affecting the city’s low-lying areas that experience frequent flooding.
Frequently Asked Questions
What should residents do during a high tide and heavy rainfall?
Residents should remain cautious, avoid driving through standing water, and check storm drains if it is safe to do so.
What are King Tides?
King Tides refer to the natural occurrence of Perigean spring tides that can reach high levels, especially during new or full moons, leading to coastal flooding.
How often do tidal flooding events occur in Charleston?
Charleston has experienced 52 recorded instances of tides exceeding eight feet since 2015, with a significant increase in frequency over the last eight years.
What can residents do to prepare for flooding?
Residents are advised to obtain flood insurance and consider retrofitting homes with flood vents to reduce damage during flooding events.
Key Features of Coastal Flooding in Charleston
| Feature | Details |
|---|---|
| High Tide Timing | Expected around 4 p.m. on Wednesday |
| Rainfall Prediction | 1-3 inches, heavier in downtown Charleston |
| Tide Level | Peaking at 8.08 feet, considered major flood stage |
| Historical Flood Data | 52 occurrences above 8 feet since 2015; 38 in the last eight years |
| Upcoming King Tide Events | April 26-29, May 25-27, October 7-11, November 4-9, December 3-6 |
| Increase in Flood Events | 580.3% increase in South Carolina, ranking third among coastal states |
Deeper Dive: News & Info About This Topic
HERE Resources
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Severe Weather Impacts Millions Across the U.S. This Weekend
Charleston Faces Critical Threats from Rising Sea Levels
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Charleston County Under High Surf Advisory After Tropical Storm Chantal
Additional Resources
- CHS Today: King Tide Events in Charleston
- ABC News 4: City of Charleston Monitoring Afternoon High Tide
- Post and Courier: Charleston Hurricane Milton Forecast Impacts
- New York Post: Flooding Hits Charleston as Powerful Storm Develops
- ABC News 4: Understanding Charleston’s Increasing Coastal Flooding
- Wikipedia: Coastal Flood
- Google Search: King Tides
- Google Scholar: Sea Level Rise Charleston
- Encyclopedia Britannica: Flood
- Google News: Charleston Weather
Author: STAFF HERE CHARLESTON
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