City vs city
Johnston vs Charleston, SC
Charleston currently scores 19 points higher overall than Johnston, with the largest gap in storm surge.
Use this comparison for relocation decisions, insurance shopping, and hazard-prioritized mitigation planning.
Hazard breakdown
Overall
Johnston: 40/100 · Charleston: 59/100
Charleston is 19 points higher.
Flood
Johnston: 25/100 · Charleston: 78/100
Charleston is 53 points higher.
Wind
Johnston: 20/100 · Charleston: 51/100
Charleston is 31 points higher.
Lightning
Johnston: 62/100 · Charleston: 49/100
Johnston is 13 points higher.
Tornado
Johnston: 48/100 · Charleston: 12/100
Johnston is 36 points higher.
Hail
Johnston: 34/100 · Charleston: 100/100
Charleston is 66 points higher.
Storm surge
Johnston: 0/100 · Charleston: 99/100
Charleston is 99 points higher.