What To Do During Severe Thunderstorms
Severe thunderstorms can produce dangerous lightning, damaging winds, hail, flash flooding, tornadoes, and widespread power outages. This guide explains the safest actions to take before, during, and immediately after severe thunderstorms.
Quick Severe Thunderstorm Safety Steps
- Move indoors immediately when thunder is heard.
- Stay away from windows.
- Monitor weather alerts closely.
- Avoid using wired electronics.
- Prepare for outages and flooding.
- Stay off flooded roads.
- Watch for tornado warnings.
- Remain sheltered until storms fully pass.
Important: Every thunderstorm produces lightning, and lightning can strike miles away from heavy rain.
Move Indoors Immediately
The safest place during a severe thunderstorm is inside a sturdy building or hard-topped vehicle.
Outdoor areas become extremely dangerous once thunder is heard because lightning may strike suddenly with little warning.
Do not wait for heavy rain before seeking shelter.
Lightning safety rule: When thunder roars, go indoors.
Stay Away From Windows
Severe thunderstorm winds and hail may shatter windows and send broken glass indoors.
Interior rooms on the lowest level of a sturdy building are generally safer during severe storms.
Keep children and pets away from windows during dangerous weather.
Avoid Using Wired Electronics
Lightning can travel through electrical wiring, plumbing systems, and communication lines.
Avoid using corded phones, plugged-in electronics, and wired gaming systems during nearby lightning activity.
Portable battery-powered devices are generally safer options during storms.
During Lightning, Avoid
- Corded phones
- Plugged-in electronics
- Showering or bathing
- Touching plumbing
- Standing near windows
- Concrete walls and floors
Prepare For Damaging Winds
Severe thunderstorms may produce straight-line winds strong enough to damage roofs, destroy trees, and knock down power lines.
Secure outdoor furniture and move loose items indoors before storms arrive whenever possible.
Stay away from trees and power lines during severe weather.
Watch For Flash Flooding
Thunderstorms can produce intense rainfall capable of creating dangerous flash flooding within minutes.
Floodwaters may rise rapidly in urban areas, creeks, underpasses, and low-lying roads.
Never underestimate moving floodwater.
Flood safety rule: Never drive through flooded roads.
Be Ready For Tornado Warnings
Some severe thunderstorms may rapidly produce tornadoes.
Monitor weather alerts closely during organized severe weather outbreaks.
If tornado warnings are issued, move immediately to an interior room on the lowest floor away from windows.
Tornado Shelter Basics
- Move to the lowest floor
- Use an interior room
- Stay away from windows
- Protect your head and neck
- Monitor emergency alerts
If You Are Driving During A Thunderstorm
Severe thunderstorms can create extremely dangerous driving conditions because of heavy rain, hail, lightning, flooding, and strong winds.
Visibility may drop suddenly during intense rainfall.
If conditions become dangerous, pull over safely away from trees and power lines whenever possible.
Prepare For Power Outages
Lightning strikes and damaging winds frequently cause widespread outages during severe thunderstorms.
Some outages may continue for extended periods depending on storm severity.
Power Outage Essentials
- LED flashlights
- Backup batteries
- Portable power banks
- Battery-powered radios
- Emergency food and water
Generator safety rule: Never run generators indoors or near windows and doors.
Monitor Weather Alerts Carefully
Severe thunderstorm conditions can change rapidly.
Watches and warnings provide important information about storm development and immediate hazards.
Monitor trusted weather sources carefully:
- National Weather Service
- NOAA weather radio
- Trusted local meteorologists
- Emergency management agencies
Protect Pets During Severe Storms
Pets may become frightened during thunderstorms because of thunder, lightning, pressure changes, and strong winds.
Keep animals indoors and secure during severe weather whenever possible.
Emergency kits should also include pet food, medications, water, and leashes.
Wait Until Storms Fully Pass
Lightning can remain dangerous even after heavy rain weakens or moves away.
Continue sheltering until thunder is no longer heard and officials confirm conditions are improving.
Dangerous flooding, downed power lines, and debris may continue after storms pass.
Post-storm safety rule: Stay away from downed power lines and flooded areas after severe weather.
Thunderstorm Recovery Challenges
Recovery after severe thunderstorms may involve outages, debris cleanup, transportation problems, flood damage, and insurance claims.
Organized preparation before storms develop helps reduce stress during recovery operations.
Severe weather preparedness remains important throughout thunderstorm season.
Related StormSafeTech Guides
Final Thoughts
Severe thunderstorms are capable of producing dangerous lightning, damaging winds, hail, flooding, tornadoes, and widespread outages with little warning.
Families who monitor weather alerts carefully, seek shelter early, prepare emergency supplies, and understand severe weather safety procedures are far more likely to stay safer during dangerous storm events.
The best thunderstorm safety strategy begins before severe weather develops.