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Biggest Cities Above 1 km Altitude on a Flooded Map

Aliens have bombarded the Earth with giant water balloons, rising the sea level by 1 kilometer! Can you guess the most populous cities that have not been submerged?
The altitude of the city center is considered
Based on urban area population according to citypopulation.de (2024)
Includes the population of any submerged parts
Quiz by
piR
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Last updated: November 3, 2023
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First submittedNovember 3, 2023
Times taken15,023
Average score60.0%
Rating4.56
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Population
Altitude
City
25.1 m
2240 m
Mexico City
16.5 m
1200 m
Tehran
14.6 m
1753 m
Johannesburg
10.4 m
2640 m
Bogota
6.70 m
1661 m
Nairobi
6.50 m
1890 m
Kunming
5.85 m
1560 m
Guadalajara
5.05 m
1070 m
Guiyang
5.05 m
1500 m
Kabul
4.73 m
2355 m
Addis Ababa
Population
Altitude
City
4.28 m
1495 m
Medellín
4.23 m
2160 m
Puebla
4.13 m
1189 m
Kampala
3.98 m
1172 m
Brasilia
3.85 m
1609 m
Denver
3.50 m
1572 m
Lanzhou
3.38 m
1574 m
Isfahan
3.35 m
1592 m
Guatemala City
3.18 m
2200 m
Sanaa
3.12 m
1400 m
Kathmandu
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39 Comments
cmr0
+5
Level 73
May 6, 2024
Great quiz!
CambodianQuizzer
+16
Level 77
May 6, 2024
I drowned. Fun.
NEGeo
+4
Level 65
Sep 18, 2024
yeah same
Dougnut
+3
Level 57
Mar 26, 2025
Me too, barely
cpgatbyu
+7
Level 88
Sep 18, 2024
If the Martian bombardment somehow triggers the collapse of the wall/fence between El Paso and Ciudad Juarez, the resulting urban agglomeration looks like it would make the list.
Tramp
+2
Level 79
Sep 25, 2024
It's a strong, water resistant fence
Neodymium
+3
Level 63
Sep 18, 2024
Can you make a quiz on largest countries by population if this happened?

And also largest USA cities?

Btw I think El Paso, Colorado Springs and Albuquerque would be the USA's next largest cities after Denver in this scenario.

Also Colorado would likely be the most populated state.

Neodymium
+3
Level 63
Sep 18, 2024
btw EVERYONE in colorado should live, the lowest point is above 1km
Neodymium
+1
Level 63
Sep 18, 2024
btw what happened to hawaii?
Neodymium
+1
Level 63
Sep 18, 2024
also perhaps a US states if all land under 1km flooded?
KiloNova
+1
Level 61
Sep 18, 2024
Really great quiz!
toowise
+4
Level 81
Sep 18, 2024
Not much land left, but a big boost to the ferry industry!
AlmostAGenius
+3
Level 89
Sep 18, 2024
Man, it was really hard for me to visualize which Chinese cities were left. Got them in the end though.
RealBillGates
+9
Level 77
Sep 18, 2024
This would be terrible for the economy.
Fianchetto
+6
Level 79
Oct 15, 2024
I know right? I would lose all my real estate in Burkina Faso.
Sly67
+1
Level 77
Sep 19, 2024
how come is la paz not here ?
IBRK
+1
Level 77
Sep 19, 2024
too small
Xtrordinary
+3
Level 75
Sep 19, 2024
Does Greenland have no data
Cooldude185
+2
Level 60
Sep 19, 2024
I may get whooshed here but Greenland's biggest city of Nuuk only has around 19,000 people in it, with every other town having less than 6,000 people. Even if Nuuk survived (which I'm pretty sure it wouldn't) it still sadly won't even be close to making the top 20.
Wistful
+3
Level 72
Sep 26, 2024
I think they were making a joke about how Greenland looks basically the same, similar to how it is normally ignored in most maps.
rphxx
+4
Level 71
Sep 24, 2024
No, most of Greenland just has an elevation of over 2.000 m
hi111223
+1
Level 70
Sep 24, 2024
W Quiz
AbiA
+1
Level 88
Sep 26, 2024
Typo in the intro: should be raising not rising.
EricF
+2
Level 81
Sep 28, 2024
No Quito? Not sure how you get urban area population in citypopulation.de since I can't find it, but it looks like it'd fit.
jordibabot
+1
Level 69
Oct 15, 2024
2.850 m and almost 2M people, definitively should be here.
piR
+3
Level 53
Oct 15, 2024
Thank you for these comments. If you had looked at the numbers more carefully, you would have noticed that they stop over 3 million inhabitants ;)
Hapsburg
+2
Level 75
Oct 10, 2024
This would be a cool map for a fiction story, waterworld with more land
okerrigan
+1
Level 67
Oct 15, 2024
Please accept Esfehan
QuizApe
+2
Level 72
Oct 15, 2024
Why isn’t the Netherlands there?
fadeaway6193
+6
Level 69
Oct 15, 2024
I thought Quito (Ecuador) and La Paz (Bolivia) are situated very high above sea levels. Or is there not enough population to get on the quiz?
QuizzerBros
+6
Level 69
Oct 15, 2024
Exactly right, not enough people
SpartanLlama
+1
Level 79
Oct 16, 2024
Yeah my thoughts exactly ^
SpartanLlama
+1
Level 79
Oct 16, 2024
16/20, fun
bentshaggyoil
+1
Level 61
Oct 16, 2024
india is gone
thisiswaytooeasy
+2
Level 48
Oct 16, 2024
and the world rejoices!
Neodymium
+2
Level 63
Nov 6, 2024
wth
Pontiac
+1
Level 62
Feb 13, 2026
I don't believe scam callers are the only people in India.
vittoriao
+1
Level 74
Aug 18, 2025
what about the alps no big cities at elevation?
Pontiac
+1
Level 62
Feb 13, 2026
There should be specs of Hawaii left
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