Dr. Jeff Masters

Yes, I have a single burner induction stove I got on sale for $50. That plus my microwave handle 90% of my cooking needs.

Switching to electric stoves can dramatically cut indoor air pollution A new study links gas and propane stove emissions to asthma and other health risks. Transitioning to electric could reduce exposure by over 50%.

Are you one of the 38% of U.S. households with a gas or propane stove? If so, spend the $50 needed to get an induction stove! New study: "if you use a gas stove, you’re often breathing as much nitrogen dioxide pollution indoors from your stove as you are from all outdoor sources combined.”

11 Best Carbon Dioxide Monitors I've Found After Testing 30+ Devices A detailed, hands-on guide to the best CO2 monitors for every budget and use case, based on real testing, sensor accuracy, battery life and essential features.

Great overview of CO2 monitoring. High CO2 is associated with COVID spread, and causes sleepiness, headaches, fatigue, and lower test scores (15% drop at 1000 ppm; 44% drop at 2500 ppm). I’ve found 2000-3000 ppm in restaurants, doctor offices, meeting rooms, churches, and airplanes.

4) But it's not just warm sea - you still need some level of mid-level humidity and limited shear for RI (looking at it very simply) - and the area and temporal frequency of these 3 conditions co-existing is increasing; 2025 was no different, especially over the Caribbean (Melissa, anyone?)

Aviation accidents “receive an intense investigation by the NTSB with specific recommendations to improve safety, while events like the July 4th flash flood with 119 fatalities rely on entities like Camp Mystic self-policing themselves and developing their own plans to try to improve safety.”

It’s critical to make “climate‑aware, nationally consistent mapping information public. Our flood mapping program should be treated as critical national infrastructure, as important as the core weather forecasting that the National Weather Service provides.” Cost: $3-$12 billion.

Home - Climate Science Legal Defense Fund We protect the scientific endeavor by putting our legal expertise to work for scientists who are threatened or silenced for doing their jobs.

On Giving Tuesday, there's no better climate cause than @csldf.org, the Climate Science Legal Defense Fund, csldf.org. They provide free legal and educational support to researchers facing harassment and intimidation, and have been record busy this year. I'm a founding board member.

Great podcast! Everyone should be breathing healthier indoor air.

Gift idea for those concerned about wildfire smoke and COVID: An excellent HEPA unit that I’ve researched (and own), the Coway Airmega AP-1512-HH “mighty”, is on sale today for $153 on Amazon. A home-built Corsi-Rosenthal box is better and costs just $100 (but is louder and takes up a lot of space).

Illustration by Shonagh Rae depicting abstracted flows of information channels through a blueprint of the US Capitol building.

Scientific information does not flow into policy the way most scientists think. Twenty years after her jarring first day as a fisheries-biologist-turned-Senate-staffer, @sheril.bsky.social lays out what every scientist hoping to influence policy on the Hill needs to know: issues.org/information-...

A Cat 4 and 5 extravaganza: A look back at the 2025 Atlantic hurricane season » Yale Climate Connections Extraordinarily, three of 2025’s 13 named storms (23%) reached Category 5 strength: Erin, Humberto, and Melissa.

After 9 straight years with a landfalling hurricane—and a record 5 straight (2020-2024) with a major hurricane landfall—the U.S. escaped any hurricane landfalls in 2025. With the unprecedented disarray affecting FEMA and NOAA, we were extremely fortunate not to be tested by a major hurricane!

Indonesia floods death toll rises to 442 as people hunt for food and water At least two areas of the worst-affected Sumatra island still unreachable, as authorities struggle to deliver aid.

Deadliest tropical cyclone of 2025: A rare low-latitude tropical storm (Senyar, which formed at 3.7N) contributed to flooding in Indonesia, Thailand, and Malaysia that has killed 775+ and left 430+ missing. Lhokseumawe, Indonesia had 15.12" (384 mm) of rain in 24h ending 12Z Nov. 26.

Great summary of the season.

Behold what happens when you fix Roger Pielke Jr's serial errors:

Another great read from @scrawford.bsky.social: "We can’t rely on the insurance industry to be the only risk-signaler for homes. These companies may be tracking hurricanes and wildfires, and translating those risks into higher premiums, but they are likely to exclude saltwater intrusion coverage."

Yes, water availability is already making Tehran, Iran unlivable, and there will be many more cities to come…

Drought is climate change's greatest threat. An attribution study by www.worldweatherattribution.org found this year's Iran drought was a 1-in-10-year event; this would have been a 1-in-50 to 1-in-100-year event without human-caused climate change. President of Iran says they will move the capital.

U.S. dams, levees, stormwater, and wastewater systems get D to D+ grades, need almost $1 trillion in upgrades » Yale Climate Connections Climate change is increasingly stressing dams, levees, wastewater, and stormwater systems through heavier precipitation events.

My post today is a reminder that we need to spend a ton of money on adaptation for our new climate, based on a report issued in March on U.S. infrastructure needs. yaleclimateconnections.org/2025/11/u-s-...

Interesting. Synthetic hurricane modeling showing higher % of named storms hitting the U.S. as hurricanes the past 22 years vs. prior 22 years. "One theory: warming seas are making storms stay longer at hurricane strength. This may not necessarily be evident from the historical data that we have."

During the core months of hurricane season (Aug-Sep-Oct), fairly persistent anomalous "troughiness" was centered over the southeast U.S., which resulted in anomalous counter-clockwise steering flow around it.
This helps explain why hurricanes generally turned northward well before reaching the U.S.

Expect this list to grow: Three of the top 5 deadliest heat waves in world history have been in Europe in the past five years. "Mitigating further global warming can reduce heat mortality, but mass mortality events remain plausible at near-future temperatures despite current adaptations to heat."

Concerning: for a high emissions scenario, the model found a 37% increase in daily extreme precipitation over land by 2100. “Much of the increase was driven by shifts in wind patterns that created chains of severe thunderstorms hundreds of kilometers long that traditional models fail to capture.”

176 participating residences in three Santa Cruz Mountains and two Sierra Nevada Mountains sites.

High fire hazard Wildland Urban Interface (WUI) residences in California lack voluntary and mandated wildfire risk mitigation compliance in Home Ignition Zones Wildfire structure losses are increasing globally and particularly in California, USA. Losses can be mitigated in part by changes to the Home Ignition…

We need to do better in the Pyrocene age: At 176 California homes, "most had little compulsory or recommended mitigations completed. Participants struggled with hazards that required frequent maintenance, including woodpiles, propane tanks, trees and shrubs, roof and gutter and deck debris."

Yes, the $14 billion damage from Hurricane Otis (2024) was 0.8% of Mexico's 1.8 trillion GDP, and the the most expensive weather disaster in Mexican history.

Sunrise this morning on the Pigeon River in northern Lower Michigan. Enjoyed a 3-day nature/meditation/yoga retreat with no news/social media. Greatly restorative!

YouTube video by Science Talk Saffir-Simpson Scale is Insufficient I Climate Change Makes Hurricanes More Extreme I Category 6

I did a 45-minute talk on hurricanes and climate change with Harvard’s Dr. Muhammad Ittefaq, Ph.D. The “lost hope” part is about our collective inability in the U.S. to do intelligent managed retreat from vulnerable coasts in a era of rising seas and stronger storms. youtu.be/v89AAsMVSdw?...

In my latest post, yaleclimateconnections.org/2025/11/the-..., I discuss how the number of major Atlantic hurricanes has been increasing in recent decades, but landfalling mainland U.S. major hurricanes have no long-term trend — though landfalling major hurricanes outside the U.S. do.

My latest post has a table of the most expensive hurricanes to affect each nation/territory/island in the Atlantic relative to GDP. Over 30 nations have suffered a storm costing more than 5% of GDP, and 13 have seen losses of at least 100% of GDP. yaleclimateconnections.org/2025/11/the-...

After Jamaica’s Disastrous Storm, Solar Power Is a Bright Spot

Much needed: "Solar power is a way for Jamaica and other nations in one of the world’s most hurricane-prone regions to become more resilient to ever-intensifying storms.
Rooftop solar has grown significantly in Jamaica; renewable energy made up about 10% of Jamaica’s power generation in 2023."