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⛈️The heat breaks today, but not without a fight: highs around 90 and scattered thunderstorms, followed by overnight lows in the 60s. Sunset is at 8:25 p.m.

Do you need an air conditioner? Or have an old window unit that still works but that you no longer use? A group called Mutual Aid Medford and Somerville has been connecting people getting rid of their air conditioners, usually because they’ve upgraded their systems or because they are moving, with people who need help keeping their homes cool. They only work with people in Medford and Somerville, but encourage people in other cities and towns to set up similar groups of their own.

“What they usually say is like, I want this to go to somebody who needs it in my community,” Sam Musher of MAMAS told GBH’s Sarah Betancourt. “We have absolutely seen a ton more requests than I’m used to in the last couple of days, I can say that for sure.” So far they’ve gotten a few dozen requests for A/C units, and have been able to find donations for most of them. If you’d like to connect with the group, check out their post here.

Four Things to Know

1. Teachers in Massachusetts have new guidelines on how and when to use time outs — letting students step out of class to calm down in a heated or stressed out moment. The Massachusetts Department of Elementary and Secondary Education is trying to mark a clear difference between a voluntary time out and mandatory seclusion, which teachers or staff can only use in an emergency.

Here’s the difference: in a time out, a student can go into a safe, well-lit, and unlocked room outside of their regular classroom. Seclusion is putting a student into a room they’re not allowed to leave, and can only be used in an emergency and with consent from the student’s parents and a mental health professional.

2. The federal Centers for Disease Control and Prevention’s advisory panel on vaccines is meeting today and tomorrow, about two weeks after U.S. Secretary of Health and Human Services Robert F. Kennedy Jr. removed all of its members and replaced them with his own picks.

In Massachusetts, Public Health Commissioner Robbie Goldstein said he’s concerned about misinformation around long-established sciences. “We should have an open discussion about the safety of vaccines. What I worry about is this won’t be an open discussion. This will be a one-sided discussion about vaccines,” Goldstein told GBH’s Morning Edition.

3. It’s official: Gov. Maura Healey yesterday signed legislation sending more than $1 billion to education and transportation projects. The money comes from the state’s tax on income over $1 million — also known as the millionaires’ tax or the fair share amendment, which voters approved in 2022. More than $500 million will go to the MBTA for infrastructure improvements, and another $100 million to local roads and bridges. Almost $600 million will go to early education, literacy tutoring and more.

“Right now, we know that we cannot count on the president or Congress’s support for investments much needed in our infrastructure, including in our schools. In fact, they’re doing just the opposite. So we have to take action ourselves,” Healey said.

4. How hot was it on the T yesterday? “It’s fricking hot!” said Debbie Scott of Brockton, standing in front of a fan at Park Street station. While the current hot streak is breaking today, summer’s just beginning.

The MBTA wants riders to know it has extra crews stationed throughout the system to assist during extreme heat. Some trains may need to operate at reduced speeds to “compensate for heat-related stress on the tracks, which could result in slightly longer travel times,” the agency said in a statement.

Public universities also hurting from Trump’s cuts to science

It’s not just Harvard: scientists at state universities are also finding their federal funding revoked under the Trump administration.

“I was hoping we’d sneak under the radar,” said UMass mechanical engineering professor Matthew Lackner, who had a six-year, $3 million grant from the National Science Foundation for renewable energy research revoked in May. “But given the topic, I wasn’t shocked.”

His lab employed 35 graduate students whose fates are now up in the air.

“I was supposed to be paid in May for the summer and I still don’t have a paycheck,” said one of them, Shannon Callaham, who studies climate change adaptation in vulnerable communities.

Though researchers whose National Institutes of Health grants were revoked recently had a federal judge in Boston rule their grants must be restored, Callaham said she’s worried her funding may not return. She also worries it’s part of a larger mission to erode trust in science.

“You have a bunch of people who are in the middle of their graduate studies who could be cut off,” said chemist Holden Thorp, a former chancellor at University of North Carolina at Chapel Hill and editor-in-chief of the journal Science.

Read Kirk Carapezza’s full reporting here.