Tropical Storm Bertha is strengthening over the Gulf of Mexico, prompting weather alerts across parts of the southern United States as forecasters warn of heavy rainfall, damaging winds, storm surge and the risk of flash flooding along the Gulf Coast.

According to the U.S. National Hurricane Center (NHC), Bertha is expected to approach the northern Gulf Coast over the next 24 hours, bringing dangerous weather conditions to several coastal communities.

Bertha Gains Strength Over the Gulf of Mexico

As of Tuesday morning, Tropical Storm Bertha was located about 115 kilometers (70 miles) southwest of Panama City, Florida, moving slowly toward the northwest.

Maximum sustained winds were estimated at 97 km/h (60 mph), with additional strengthening possible before the storm reaches the coastline.

Meteorologists continue to closely monitor Bertha’s track as conditions remain favorable for further development over the warm waters of the Gulf of Mexico.

Millions from Florida to Louisiana are under tropical storm alerts as Tropical Storm Bertha strengthens in the Gulf. Storm Specialist Dr. Greg Postel breaks down the latest forecast: pic.twitter.com/GzcQYnxQ3Q

— The Weather Channel (@weatherchannel) July 21, 2026

Coastal States Under Tropical Storm Alerts

The National Hurricane Center has issued Tropical Storm Warnings and Watches for portions of the northern Gulf Coast.

Residents across coastal areas are being warned of:

• Heavy rainfall capable of producing flash flooding
• Strong tropical-storm-force winds
• Dangerous storm surge in vulnerable coastal locations
• Rough surf and life-threatening rip currents
• Possible localized tornadoes within outer rainbands

Forecasters expect the worst weather to impact parts of the Gulf Coast through Tuesday and into Wednesday.

Flooding Could Become the Greatest Threat

While Bertha is not forecast to become a major hurricane, emergency officials emphasize that flooding may be the storm’s most significant hazard.

Slow-moving tropical systems are capable of producing prolonged periods of intense rainfall, increasing the risk of urban flooding, overflowing rivers and dangerous flash floods in low-lying communities.

Residents in flood-prone areas are being urged to remain alert and closely follow evacuation orders or emergency instructions issued by local authorities.

Authorities Urge Residents to Prepare

Emergency management agencies are encouraging residents to:

• Monitor official forecasts from the National Hurricane Center.
• Avoid unnecessary travel during severe weather.
• Prepare emergency kits and supplies.
• Stay away from flooded roads and coastal areas.
• Follow evacuation orders if issued.

Officials stress that conditions can deteriorate rapidly as tropical storms approach land.

Tropical Season Becoming More Active

Bertha is another reminder that the Atlantic hurricane season is entering a more active period.

Warm sea surface temperatures across the Gulf of Mexico continue to provide favorable conditions for tropical cyclone development, and forecasters expect additional systems to form in the coming weeks.

Meteorologists will continue monitoring Bertha as it approaches the U.S. Gulf Coast and provide updates on any changes in intensity or track.