Four people have been injured as a storm system sweeping across the South is kicking off a severe weather threat for much of the Gulf Coast Saturday, with potential for a full weekend washout along parts of northern Florida and Georgia.

South Tarrant County was under a tornado warning, and sirens sounded across Fort Worth and other cities because of severe storms. Damage ranges from downed trees and power lines to a collapsed warehouse building.

Severe storms in Ellis and Johnson counties led to the death of one man and injured others as powerful winds overturned RVs and semi-trucks.