Hurricane Harvey Will Produce One Huge Dead Zone in Gulf

The tragic events affecting millions of people living in the path of Hurricane Harvey are being immediately reported and followed by scores of people around the planet. Harvey has been called a 500-year storm, carrying such force that there is in any given year less than a .002% chance of a storm of this power occurring.

The devastation is epic, and watching in real-time it is hard to imagine things getting worse. Although no estimates can be firm at this point, it is safe to say that bricks and mortar clean-up and reconstruction will take months, if not years, to complete.

Cattle Ride Herd in TX

Some of Harvey’s damage, however, is now more or less going sight unseen. It will, however, soon become all too obvious.

In the coming weeks and months, any who take a cruise through, or fly over, the Gulf of Mexico may see first-hand another awful bi-product from Harvey’s torrential downpours.

A deadzone, created from the phosphorus of farm manure runoff into rivers and streams, will be appearing — most likely the size of the State of New Jersey.

Perhaps even larger.

A discussion on whether this human-promoted environmental disaster could have at least been reduced in its magnitude is, at this point, idle chatter. This mess, unlike bricks and mortar destruction, cannot be repaired. It will not be halted.

All this is 100% understandable – if not 100% preventable. It is about farm animals, and agriculture.

Cattle Farms Abound in East TX


Lots of animals.
Lots of manure.
Lots of phosphorus.
Lots of Harmful Algae Blooms (HAB) creating lots of deadzones.



Hurricane Harvey has left a path of destruction that will take Texans years to repair. Sadly, for life in the Gulf of Mexico and for the many thousands people who make their living fishing the Gulf, or work in tourist trades that abound around the Gulf, the farm runoff damage this go-around cannot be undone. It will be massive, and irrevocable.

To the degree that farms provided insufficient grass buffers between waterways and cropped land, tilled marginally productive sloped acres, or — worst of all — poorly managed manure and fertilization levels, the environmental damage from Harvey will be proportionate to the negligence.

Fact: farms can always, within reason, do better managing land and manure.

The filthy aftermath of Hurricane Harvey will make that, in an obvious play on words, perfectly clear.


In the aftermath of Matthew … more water concerns.

Searching through articles post-Hurricane Matthew has yielded a host of concerns for the entire Eastern USA Seaboard – the area that was pummeled by the storm last week. Since much of what we have discussed regarding Harmful Algae Blooms (HABs) has focused on Southeast FL in general, and Lake Okeechobee (Lake O) in particular, let’s keep the conversation there for today.

And it is a messy matter, indeed. is a superb resource for all things Lake O and, truly, the issues facing Southeast Florida. As always, at the very foundation of HABs rests an overabundance of phosphorus.

And Lake O has way too much.

HAB in Southeast FL
HAB in Southeast FL

The question of what can be done is moot. That solution is multifaceted, time consuming and, most troublesome, costly. It involves several approaches, including better land management and sophisticated technology.

What will be done is this: to keep Lake O from flooding surrounding areas – which is always a distinct possibility, whenever the lake rises to 15 feet or so — nearly 2 billion gallons of water per day will be drained. With no set timetable for ending. It depends on how much rain continues to fall. And how dry the upcoming dry season of October, November and December really is.

All that said, for perspective, an area as large as roughly 1800 football fields, with 10′ deep water, would hold close to 2 billion gallons.

HABs in Southeast Florida will again make their presence known in 2017. And excessive phosphorus is the reason.


Hurricane Matthew: Southeast Florida Vulnerable

Within hours, Hurricane Matthew will smash its Category 4 chaos on the narrow, flat peninsula that is the State of Florida. And here I sit, safe from this destructive powerhouse about which many in my area remain blissfully unaware; writing from my porch in tiny West Bend, WI. Despite this distance, what I know from research is that, while the evacuation of humans from the highest-risk areas may prove effective in saving lives, in every other way Florida cannot possibly be ready for this.

Category 4 is massive. It has been over 100 years since a Category 4 hurricane hit Florida.

Hurricane Matthew Slams Into Bahamas
Hurricane Matthew Slams Into Bahamas

And that was the ONLY time.

The deadliest hurricane on record happened in Galveston, TX, in 1900. That hurricane? Category 4.  To add perspective, Hurricane Katrina — infamous for its horrific explosion on the City of New Orleans — was Category 3.

The only Category 5 hurricane to hit the USA was Andrew, in 1992. Fortunately for Florida, Andrew did not dump loads of rain. Why? Because the dikes holding back Lake Okeechobee can handle heavy winds and fallen trees. Excessive amounts of rainfall? Not so much.

According to Lloyds Emerging Risk Team, Southest Florida’s Lake Okeechobee – roughly the size of Rhode Island —  is the second most hurricane-vulnerable place in the United States, right behind New Orleans. Eventually, the Lake’s dikes can contain only so much water.

Currently, according to Florida Fish & Wildlife Conservation Commission (FWC), Lake Okeechobee’s depth sits at near-record averages of about 15.5 feet:

“Okeechobee water levels continue at almost record highs after an extremely wet summer and fall. The current water level on Lake Okeechobee as of September 25, 2016 is 15.66 ft. NGVD, just over a foot higher than last year. The lake level has increased almost a foot within the last month.”

Hurricane Matthew will drop at least 7″ of rain into the Lake, causing a rise of perhaps 2-feet. It is possible Matthew will pour 10″ or more — and that could create as much as a 3-foot rise.

The lowest of Okeechobees dikes rests at slightly higher than 18 feet — uncomfortably low with Hurricane Matthew approaching, according John Campbell of the Army Corp of Engineers.

Parts of the Herbert Hoover Dike that surrounds Lake Okeechobee start to become vulnerable at 17.5 feet, Campbell noted. 

“Certainly our concern all year is what happens if we get a lot of precipitation and the lake level rises,” Campbell said. “A (rise over 17 feet) would take us to areas where historically we’ve had some challenges and it’s certainly something we’d like to avoid.”

An unfortunate byproduct of Hurricane Matthew may be that the historic HABs (Harmful Algae Blooms) of 2016, which wiped out most of Southeast Florida’s Gold Coast tourist season, will repeat themselves in 2017. Hundreds of millions in tourist dollars will again be at stake.

For area businesses who rely on tourist trade, this loss of income would clearly be devastating.

That said, if Matthew causes a breech to a significant piece of the Lake Okeechobee dike — and this possibility is at present razor-thin close — Southeast Florida will be looking at a disaster reminiscent to what we saw in New Orleans, with Hurricane Katrina.

In two days, we’ll know.