President-elect Donald Trump has confirmed that he will deliver his inaugural address indoors on January 20 as dangerously cold weather is expected to hit Washington next week.

This speech and others will now take place inside the U.S. Capitol Rotunda rather than outside the building.

The inaugural parade will also be held indoors at Capital One Stadium in Washington, about a mile (1.6 kilometers) from downtown Washington, and all three inaugural balls will also be held indoors.

The last president to be sworn in indoors was Ronald Reagan in 1985, when cold weather also plagued the U.S. Capitol.

In a statement posted on his Truth Social social media platform, Trump said he “does not want to see people being harmed in any way during the freezing temperatures.”

It’s a dangerous environment for “tens of thousands of law enforcement officers, first responders, police K9s and even horses” and “hundreds of thousands” of supporters.

“Anyway, if you decide to come, please dress warmly,” he added.

Capital One Stadium will also be open for live viewing of the inaugural address.

Trump, who plans to hold a rally there on Sunday, said he would visit the arena after being sworn in at the Capitol.

The planned parade will now take place in a modified format. It’s unclear whether it will take place indoors.

Extreme cold is expected in Washington, D.C., on Inauguration Day, with lows expected to be -11 degrees Celsius (12 degrees Fahrenheit) and highs of -5 degrees Celsius (23 degrees Fahrenheit). Temperatures will get significantly cooler given the wind chill.

The weather is part of a larger polar vortex that will send temperatures plummeting across the United States.

“Everyone will be safe, everyone will be happy, and together we will make America great again,” Trump wrote.

Before the inauguration, organizers had said they would distribute about 220,000 tickets to view the event inside the U.S. Capitol.

Those without tickets can also watch the ceremony on the National Mall.

Alternative plans are now needed for these tourists and the tens of thousands of other visitors to the city.

Trump said other inaugural events, including Sunday’s rally and three separate official inaugural balls Monday night, will go ahead as planned.

The move indoors means more limited capacity when Trump is sworn in on Monday, and Trump is known to closely track attendance at his public events.

After his first inauguration, he claimed that “one hundred and fifty people” attended the National Mall.

But crowd-size experts say that’s about a third of the estimated 800,000 to 1 million people who attended a 2009 Barack Obama party.

Only around 1,000 people attended Joe Biden’s inauguration at the Capitol due to Covid-19 restrictions.

In 1841, 68-year-old President William Henry Harrison delivered the longest inaugural address in American history in cold, wet conditions.

He caught a cold, then pneumonia, and died a month later, making his presidency the shortest in U.S. history.