The United States is in a blood supply crisis so severe that the American Red Cross has only seen it once before in its entire 150-year history. Supply levels dropped by a quarter in a single month. And yes, a diarrhea parasite is partly responsible.
Just How Bad Is 'Crisis Level'?
The American Red Cross supplies about 40% of all blood used in the United States. That is a staggering amount of national medical infrastructure resting on one organization. Right now, according to Dr. Courtney Lawrence of the Red Cross, they are distributing roughly 3,500 more units than normal for this time of year and are having to dip "very, very low" into their inventory to do it.
The BBC reports that the only other time the Red Cross declared a blood supply crisis was January 2022, when the Covid pandemic collided with a brutal winter. This is the second time. It is summer. The blood does not keep. Donated blood expires within 42 days because red blood cells degrade over time, which means you cannot just warehouse your way out of this problem. You need people showing up and giving blood, consistently, and right now they are not.
A Perfect Storm of Awful Things
Lawrence told the BBC that several factors converged to turn an existing shortage into something genuinely alarming. Summer already strains supply because more people are outside, which means more car accidents and more injuries requiring transfusions. Hospitals need more blood in July than they do in February. That part is predictable and planned for.
What was not planned for: record heat waves keeping people indoors and forcing blood drive venues to cancel because they could not maintain safe temperatures. More wildfires diverting emergency resources. And then, because 2025 apparently had unfinished business to conduct into 2026, a nationwide outbreak of cyclosporiasis, which the BBC delicately describes as an "explosive diarrhoea parasite." People who are sick with a foodborne illness cannot donate blood. A meaningful number of potential donors apparently are, right now, very sick with a foodborne illness.
Every blood type is running short, the Red Cross says, but O positive is the most urgent need. O positive is the most common blood type in the country and the one trauma teams reach for first when they do not have time to check a patient's type.
Hospitals Are Thinking About Turning People Away
This is the part that should make you put your phone down for a second. Lawrence told the BBC that some hospitals have started considering whether they may need to divert patients to other trauma centers if they cannot keep enough blood on their shelves. Not diverting them because of staff shortages or capacity issues. Diverting them because of blood.
There is also the question of routine operations. Surgeries that require blood transfusions, scheduled weeks in advance, could face delays or cancellations if supply does not recover. This is not hypothetical. Hospitals are actively weighing it right now, according to the Red Cross.
Canada Is Also Running Dry, and Nobody Knows Why
The crisis is not limited to the United States. Canadian Blood Services reports that supply has declined by nearly 20% since the start of June. Unlike in the US, where there is at least a grim explanation involving heat and parasites, Canada has no clear answer.
"While a seasonal decline in donations is expected during the summer months and factored into planning, appointment bookings have fallen well below typical summer patterns," Canadian Blood Services said in a statement reported by the BBC. They are running short on multiple blood types. They describe current inventory levels as "not sustainable for patient care" if the trend does not reverse. Appointment shortfalls have run between 1,500 and 2,500 per week for six straight weeks. That is an enormous gap between where they expected to be and where they are, with no obvious cause attached to it.
What You Can Actually Do Right Now
The American Red Cross is asking people to donate. If you are eligible, healthy, and not currently experiencing explosive gastrointestinal symptoms, you can schedule an appointment at redcrossblood.org. Walk-in donation centers exist in most cities. The whole process takes about an hour.
O positive donors are the most urgently needed, but the Red Cross has been clear: all blood types are critically short. This is one of those rare news stories where clicking away and doing nothing has a measurable, literal cost measured in units of blood that hospitals do not have.
The Dingo Take
You are supposed to look at a story like this and think: systems are working, experts are on it, someone is in charge. And technically, yes, the Red Cross is sounding the alarm loudly and clearly. They are telling hospitals, they are telling the press, they are telling anyone who will listen. The problem is that the alarm requires individual human beings to respond to it, one appointment at a time, and individual human beings are busy and hot and possibly afflicted with a diarrhea parasite.
There is also a larger, uglier context sitting underneath this story. Extreme heat making blood drives impossible to hold is a climate story. Wildfires draining emergency resources are a climate story. The cascading failure of multiple systems at once because of compounding environmental disasters is exactly the scenario that climate scientists have been describing for twenty years while policymakers held hearings and issued statements and moved on. We are now living in the scenario. The blood supply is one of the places it shows up.
None of this is inevitable. People donating blood is the single most direct fix available right now, today, this week. But the conditions that keep producing these crises are going to keep producing them until something structural changes. The Red Cross cannot fix that with a blood drive. Neither can you, by yourself, rolling up your sleeve. But right now, in this specific crisis, rolling up your sleeve is still the most useful thing most people can do. So go do it.
Comments