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Megastorm

2026Series

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Extreme weather told by the people inside it

Megastorm reconstructs destructive weather events through the experiences of those caught in them. Produced by 72 Films, the eight-part documentary series combines accounts from survivors, storm chasers and emergency responders with footage recorded as the events unfolded. Each episode concentrates on one catastrophe, giving the series a case-by-case structure.

That approach brings together two kinds of information: what a disaster felt like at ground level and the conditions that helped it develop. The series is interested in the mechanisms of extreme weather as well as its effects on people. Personal testimony provides the human thread through episodes about very different hazards.

Hurricanes, tornado outbreaks and fires

The episode lineup includes Hurricane Harvey and the flooding it brought to Houston, Hurricane Helene’s impact on North Carolina, and the December tornado outbreak in Tennessee. Other chapters cover Alabama’s 2011 tornado outbreak and the tornado that struck Rolling Fork, Mississippi. Together they show that the title encompasses several forms of severe weather.

Wildfire and flood episodes widen the geography. Australia’s Black Summer, wildfires in Portugal and Spain, and the Valencia floods appear in the season. The selection allows viewers to compare how heat, fire, wind and water produce different emergencies, rather than expecting every episode to follow a single type of storm.

The series explores how Australian fires generated their own weather and how warm Gulf waters contributed to hurricane conditions. It examines both an event’s initial conditions and the ways a disaster can intensify once it is underway.

Eyewitness footage and reconstruction

Fremantle describes the accounts being cut together with raw footage shot by the people involved. This gives the programme an immediate visual record as well as retrospective testimony: images document moments within the disaster, while later accounts explain the experience around them.

The series is executive produced by John Douglas, with Charlie Ferriday as series producer and Ben Allen as series editor. Its emphasis on individual experiences makes it a useful choice for viewers interested in the human consequences of disasters as well as weather science. The episode guide below identifies the specific events covered.

Episodes

S01 · E01

Hurricane Harvey

Hurricane Harvey explodes into a violent Category 4 storm, the first to strike the U.S. mainland since Hurricane Katrina. When two strong weather fronts block Harvey, it stalls over Houston and unleashes billions of tons of rain. The flooding is catastrophic, leaving thousands in danger, including Iashia, a Katrina survivor.

S01 · E02

Tennessee Tornado Outbreak

In one day in December 2023, three supercells, nature's most violent storms, travel through Tennessee, triggering a rare winter tornado outbreak. Local news meteorologist Danielle and storm chaser Caleb broadcast warnings of potential disaster as the supercells unleash deadly twisters striking Clarksville and the surrounding areas of Nashville.

S01 · E03

Australian Wildfires

Wildfires are part of life in Australia, but in the summer of 2019 the country is drier and hotter than ever. In what becomes known as the Black Summer, 24 million hectares burn. Firefighters David and Matt take on a new species of fire, 19-year-old India battles to save her home, and the Royal Australian Navy carry out an unprecedented evacuation.

S01 · E04

Hurricane Helene

Fuelled by unusually hot water in the Gulf, a monster hurricane batters Florida. Storm chasers Max and Aaron document the incredible coastal storm surge, but as Hurricane Helene tears inland, it collides with the peaks of North Carolina, causing a one-in-a-thousand-year weather event impacting the Blue Ridge Mountains' communities forever.

S01 · E05

Portuguese and Spanish Wildfires

A heat dome, a powerful weather phenomenon, creates perfect conditions for wildfires as firefighters struggle to cope. In north-east Portugal Sophie drives through intense flames to save her family from a devastating wildfire. Rui, a Portuguese firefighter breaks protocol to cross the border to save a Spanish village in danger of being engulfed.

S01 · E06

Alabama Tornado Super Outbreak

On April 27, 2011, a record 62 tornadoes rip through Alabama during the United States' largest ever tornado super outbreak. But one, in Tuscaloosa, proves especially deadly. This tornado is on the ground for 90 minutes, leaving a trail of destruction 80 miles long, as weather reporter Richard desperately tries to get residents to take cover.

S01 · E07

Valencia Floods

On October 29th 2024, Valencia is devastated by Spain's deadliest flood. Record heat fuels a rare storm that dumps over a year's worth of rain in a single day, submerging communities and catching residents off guard. Over a million people were affected and at least 230 died. Survivors tell the stories of how their lives changed forever.

S01 · E08

US Southern Twisters

America's most powerful tornado in a decade hits Rolling Fork, Mississippi. When emergency services are unable to reach the scene, a group of storm chasers there to film events put down their cameras to help the injured, including 21-year-old Freddie. A year later, Freddie is once again first on the scene during a violent tornado in Texas.

Episode descriptions: TVmaze · CC BY-SA 4.0

Film details

Format
Documentary series
Release year
2026
Premiere date
2026-10-14
Production companies
72 Films
Language
English

Catalogue information: TVmaze · CC BY-SA 4.0