We're Under a "Heat Dome," and I Couldn't Answer Jinguk's Simplest Question: Where's the Nearest Cooling Shelter?
New York summers always look like this in movies. This week it stopped being charming.I opened the door this morning, felt the wall of heat, and closed it again. Ten seconds of standing outside felt like standing in front of an open oven.
Then I checked my phone. Governor Hochul had already issued a public warning telling New Yorkers to prepare for several straight days of extreme heat. That's when I knew this wasn't a normal "hot week."
What a Heat Dome Actually Is
The thing hovering over the entire Northeast right now has a name: a heat dome. High pressure parks itself over a region and traps hot air underneath it, like a lid on a pot. The air can't escape, so it just keeps getting hotter, day after day.
When the air has nowhere to go, the heat just keeps stacking up.Nearly 200 million people across the US are inside this thing right now. New York, Philadelphia, and Washington DC are all under an Excessive Heat Warning through Saturday.
Jinguk's reaction when I explained it: "So the sky is basically a blanket nobody asked for."
Accurate.
The Numbers That Made Me Actually Worried
Today, the actual temperature is in the mid-90s — not unheard of for July. But the heat index (what it feels like once humidity is factored in) is climbing to 106°F.
Thursday and Friday are worse. Actual temperatures are expected to hit 100°F in Central Park. That hasn't happened here in July since 2012 — fourteen years.
The heat index those two days: 105 to 110°F.
And this isn't a one-day spike. It's expected to peak Friday and linger straight through the July 4th holiday weekend.
What Jinguk Kept Asking About
The part of this that genuinely surprised Jinguk wasn't the heat itself — Korea gets brutal, humid summers too. It was the infrastructure gap.
"Where's the 무더위쉼터?" he asked. Mudeowi swimteo — literally "heat-avoidance shelter." In Korea, when a heat advisory hits, cities open community centers, senior centers, even subway station lobbies as free, air-conditioned public spaces anyone can walk into. They're everywhere, they're advertised, and everyone over the age of six knows where the nearest one is.
The US has an equivalent — cooling centers — but ask ten New Yorkers where their nearest one is and you'll get ten blank stares. The concept exists. The public awareness doesn't.
What the US does have, and does well: nearly every building, subway car, and store is aggressively air-conditioned. Jinguk's counter-observation: "You go from 106 degrees to freezing in one doorway. That's its own problem." He's not wrong — I catch a summer cold almost every year purely from the whiplash between outdoor heat and indoor AC.
Half the city is improvising its own cooling infrastructure this week.The Warning System Itself
The US ranks heat risk in stages: a Heat Advisory (be careful), an Excessive Heat Watch (dangerous heat possible in the next few days), and an Excessive Heat Warning (dangerous heat happening now — where we are this week).
It's conceptually close to Korea's 폭염주의보/폭염경보 system, but the trigger temperatures vary by region in the US. A city used to mild summers can issue a warning at a lower temperature than a city where 100°F is a normal Tuesday — because the risk isn't really about the number, it's about whether people's bodies (and buildings) are built for it. The Northeast is exactly that kind of unprepared-for-this region right now.
What This Means for the Weekend
If you had July 4th fireworks plans, check both the heat index and the air quality forecast before you commit to standing outside for two hours. This one isn't cooling off in time for the holiday — it's expected to still feel like triple digits through the long weekend.
We're keeping the AC on, the blinds down, and staying in until this breaks — a good excuse to actually get back to the easel instead of pretending I had ambitious outdoor plans. Jinguk just finished 참교육 (Teach You a Lesson), the vigilante-teacher drama that hit #1 on Netflix here the week it dropped, and he's still processing it days later.
Also somehow thriving in this heat: the 깻잎 in the garden upstate — still baby leaves, too small to pick yet, but growing like they're enjoying this. Give it a couple more weeks and we'll finally have enough for a real batch of wraps.
Sumi | NYC + Hudson Valley | @miguktv on YouTube
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