A recent study revealed that roughly 13 million Americans could be at risk from risiing seas caused by climate change. The National Oceanic and Atmospheric Administration projects that seas could rise up to 6 feet (1.8 meters) by 2100 in the worst-case scenario, and at least 3-feet (0.9 m) in more optimistic scenarios. Based on projections of population growth in these areas, the worst-case scenario will lead to 13 million climate change refugees in the continental U.S., the study suggests, while a lower sea level rise  will displace 4.2 million people in the continental U.S.

Nearly half of the people affected will live in Florida, and under the highest sea level rise, a third of the county of Miami could be forced to relocate, the study suggests. From Miami-Dade County to San Mateo, California, here is the list of places at biggest risk. [Read the full story on the climate change refugees]

Rank County State People at risk, 3-foot rise Percent at risk 3-foot rise People at risk, 6-foot rise Percent at risk 6-foot rise
1 Miami-Dade FL 231,336 4.20% 1,967,018 35.90%
2 Broward FL 102,992 2.50% 1,543,944 36.80%
3 Pinellas FL 101,613 4.80% 391,872 18.40%
4 Lee FL 86,027 6.30% 299,514 22.00%
5 Jefferson LA 196,995 18.90% 289,706 27.80%
6 Nassau NY 69,607 2.70% 257,560 10.20%
7 San Mateo CA 190,189 12.40% 249,020 16.20%
8 Orange CA 65,336 0.90% 225,720 3.20%
9 Charleston SC 81,943 11.30% 195,698 26.90%
10 Ocean NJ 86,430 6.50% 176,360 13.40%
11 Alameda CA 39,530 1.30% 175,522 5.90%
12 Volusia FL 49,773 4.50% 169,432 15.40%
13 Suffolk MA 19,735 2.10% 168,000 17.60%
14 Collier FL 39,703 5.60% 162,433 22.70%
15 Kings NY 4,376 0.10% 161,564 4.80%
16 Orleans LA 103,112 17.20% 160,006 26.70%
17 Queens NY 27,773 0.80% 159,372 4.40%
18 Terrebonne LA 88,080 36.80% 156,439 65.40%
19 Palm Beach FL 26,090 0.90% 149,814 5.00%
20 Suffolk NY 69,625 2.10% 145,291 4.40%
21 Duval FL 65,402 3.60% 144,058 7.80%
22 City of Virginia Beach VA 46,017 4.20% 143,226 13.10%
23 Monroe FL 91,557 54.80% 138,886 83.10%
24 Hillsborough FL 34,291 1.30% 137,749 5.10%
25 Brevard FL 44,099 3.50% 134,442 10.70%
26 Atlantic NJ 45,579 8.80% 128,451 24.80%
27 Galveston TX 29,487 4.80% 124,626 20.20%
28 Lafourche LA 88,242 44.20% 122,834 61.60%
29 Hudson NJ 9,580 1.10% 114,026 12.60%
30 New York NY 7,315 0.30% 109,045 4.80%
31 Jefferson TX 57,070 12.40% 108,965 23.70%
32 Charlotte FL 33,408 8.90% 108,100 28.80%
33 Chatham GA 49,587 9.50% 96,427 18.40%
34 St. Johns FL 42,340 10.70% 94,969 24.10%
35 Middlesex MA 11,697 0.40% 91,589 3.40%
36 Marin CA 65,508 12.20% 90,049 16.70%
37 Manatee FL 45,130 6.30% 88,880 12.40%
38 Beaufort SC 32,639 9.70% 88,281 26.20%
39 St. Charles LA 53,299 45.90% 82,914 71.40%
40 Sarasota FL 25,218 2.90% 80,660 9.30%
41 Cape May NJ 38,168 18.70% 79,345 38.90%
42 St. Mary LA 45,930 43.50% 75,426 71.50%
43 St. Tammany LA 36,375 6.90% 75,200 14.30%
44 Monmouth NJ 25,260 1.90% 74,271 5.70%
45 Bergen NJ 30,805 1.80% 73,337 4.40%
46 St. Bernard LA 48,689 47.50% 67,865 66.20%
47 Pasco FL 30,499 2.90% 67,056 6.30%
48 City of Norfolk VA 16,531 4.10% 65,140 16.00%
49 Santa Clara CA 25,897 0.60% 63,845 1.60%
50 City of Hampton VA 17,797 5.50% 62,778 19.50%
51 Fairfield CT 18,255 1.10% 57,550 3.30%
52 City of Chesapeake VA 20,206 3.80% 56,166 10.40%
53 Glynn GA 23,795 14.40% 48,127 29.00%
54 Ascension LA 18,912 8.50% 47,474 21.30%
55 St. John the Ba LA 19,996 19.80% 46,035 45.60%
56 San Diego CA 13,515 0.20% 45,034 0.60%
57 Essex MA 18,962 1.50% 44,353 3.50%
58 New Haven CT 20,360 1.30% 43,303 2.70%
59 Brazoria TX 19,463 2.90% 42,636 6.30%
60 Indian River FL 14,722 4.80% 42,588 13.80%
61 Sussex DE 25,290 6.40% 42,041 10.70%
62 Dare NC 25,737 32.90% 39,989 51.10%
63 Plymouth MA 21,344 2.20% 39,512 4.10%
64 Carteret NC 18,180 12.50% 39,231 26.90%
65 Los Angeles CA 16,284 0.10% 38,760 0.20%
66 Jackson MS 26,126 8.30% 38,534 12.30%
67 Martin FL 15,618 4.60% 37,841 11.20%
68 Solano CA 17,043 1.90% 36,968 4.10%
69 Bay FL 15,440 4.20% 36,947 10.00%
70 Middlesex NJ 16,867 1.00% 35,554 2.10%
71 St. Lucie FL 16,820 2.80% 35,305 5.80%
72 Worcester MD 10,987 10.70% 34,872 33.90%
73 San Francisco CA 3,049 0.30% 33,364 2.90%
74 Anne Arundel MD 15,047 1.30% 33,019 2.80%
75 New Hanover NC 16,405 3.90% 32,594 7.70%
76 Camden NJ 9,424 1.00% 32,476 3.30%
77 Barnstable MA 12,957 2.70% 30,481 6.20%
78 Burlington NJ 12,686 1.30% 30,393 3.20%
79 Horry SC 17,204 3.00% 30,256 5.30%
80 Harris TX 13,741 0.20% 30,000 0.30%
81 Norfolk MA 9,793 0.80% 29,527 2.30%
82 Baldwin AL 21,221 5.50% 29,505 7.70%
83 Clay FL 12,404 2.90% 29,225 6.90%
84 Baltimore MD 12,819 0.70% 28,933 1.70%
85 Assumption LA 23,810 56.70% 28,623 68.20%
86 Salem NJ 14,527 12.80% 28,095 24.70%
87 Mobile AL 17,017 2.00% 27,799 3.20%
88 Calcasieu LA 15,076 3.80% 26,897 6.70%
89 Escambia FL 12,531 2.00% 26,697 4.20%
90 Orange TX 14,900 8.30% 26,592 14.80%
91 Vermillion LA 9,220 8.50% 26,580 24.40%
92 Iberia LA 15,087 10.30% 26,444 18.10%
93 St. James LA 18,938 48.00% 25,955 65.80%
94 Santa Rosa FL 13,769 4.20% 25,921 7.90%
95 New Castle DE 13,390 1.20% 25,368 2.30%
96 Craven NC 12,353 5.80% 24,704 11.70%
97 Currituck NC 16,667 33.20% 24,604 49.00%
98 Grays Harbor WA 13,438 11.10% 24,227 20.10%
99 Contra Costa CA 14,145 0.60% 23,572 1.00%
100 Pasquotank NC 7,209 9.40% 23,399 30.70%
101 Plaquemines LA 15,578 32.40% 23,331 48.60%
102 Citrus FL 10,273 3.10% 23,080 7.00%
103 Berkeley SC 9,425 2.40% 22,960 5.90%
104 Richmond NY 8,017 0.90% 22,401 2.40%
105 Harrison MS 13,415 3.30% 22,084 5.50%
106 Okaloosa FL 7,647 1.90% 21,534 5.20%
107 Flagler FL 7,714 3.90% 21,369 10.90%
108 Nassau FL 10,637 6.80% 21,230 13.50%
109 City of Poquoson VA 8,626 27.70% 21,049 67.60%
110 Bristol MA 7,538 0.80% 20,665 2.10%
111 Georgetown SC 11,485 9.40% 18,562 15.20%
112 Westchester NY 4,462 0.30% 18,346 1.10%
113 Nueces TX 4,020 0.60% 17,568 2.50%
114 Ventura CA 1,832 0.10% 17,533 0.90%
115 Onslow NC 10,031 2.70% 17,479 4.70%
116 Accomack VA 12,618 22.60% 16,910 30.30%
117 Hancock MS 10,844 11.10% 16,284 16.70%
118 Beaufort NC 9,098 9.90% 16,175 17.60%
119 Brunswick NC 9,170 4.00% 16,057 7.00%
120 Cameron TX 9,961 1.20% 16,012 1.90%
121 Humboldt CA 9,491 3.60% 15,974 6.10%
122 City of Portsmouth VA 3,280 1.80% 15,307 8.40%
123 Gloucester NJ 6,513 1.10% 15,178 2.60%
124 Livingston LA 11,024 4.00% 14,933 5.50%
125 Philadelphia PA 4,603 0.20% 14,925 0.70%
126 Bronx NY 1,688 0.10% 14,754 0.80%
127 Rockingham NH 8,151 1.30% 14,438 2.30%
128 Somerset MD 10,720 27.10% 14,284 36.10%
129 Middlesex CT 8,931 2.70% 13,791 4.10%
130 Queen Anne's MD 5,944 6.10% 13,350 13.60%
131 York VA 5,926 4.20% 13,165 9.20%
132 Camden GA 6,705 6.20% 13,155 12.10%
133 Union NJ 3,164 0.40% 12,906 1.40%
134 St. Martin LA 4,214 4.00% 12,750 12.00%
135 Cumberland ME 5,868 1.10% 12,749 2.40%
136 New London CT 5,691 1.10% 12,687 2.40%
137 Chambers TX 11,960 16.60% 12,568 17.40%
138 Aransas TX 4,491 8.80% 11,874 23.20%
139 Essex NJ 459 0.00% 11,752 1.10%
140 Tangipahoa LA 10,819 4.60% 11,737 4.90%
141 Hernando FL 7,754 2.00% 11,661 3.00%
142 Cumberland NJ 6,660 2.50% 11,138 4.20%
143 Snohomish WA 6,517 0.40% 11,089 0.70%
144 Iberville LA 4,623 9.30% 10,646 21.30%
145 Cameron LA 9,039 63.00% 10,457 72.90%
146 City of Newport News VA 4,573 1.10% 10,372 2.60%
147 Walton FL 5,126 4.60% 10,301 9.30%
148 Bristol RI 4,923 5.40% 9,908 10.90%
149 Putnam FL 6,621 4.00% 9,573 5.80%
150 Dorchester MD 6,030 10.90% 9,563 17.20%
151 Kent DE 5,917 1.80% 9,427 2.80%
152 Gloucester VA 4,941 6.20% 9,420 11.90%
153 City of Suffolk VA 6,738 3.60% 8,987 4.80%
154 Monterey CA 2,049 0.20% 8,851 1.00%
155 Dorchester SC 6,060 2.10% 8,802 3.00%
156 Washington RI 3,634 1.40% 8,715 3.30%
157 York ME 5,152 1.30% 8,523 2.20%
158 Wakulla FL 5,269 8.50% 8,425 13.50%
159 St. Marys MD 4,410 2.00% 8,191 3.60%
160 Newport RI 2,713 1.70% 7,846 5.10%
161 Clatsop OR 5,183 8.00% 7,815 12.10%
162 Pitt NC 4,092 1.20% 7,797 2.30%
163 Delaware PA 3,221 0.30% 7,695 0.80%
164 Hyde NC 6,672 70.50% 7,598 80.20%
165 Calvert MD 5,352 2.80% 7,594 4.00%
166 Skagit WA 4,253 1.80% 7,484 3.20%
167 Pender NC 3,996 3.80% 7,299 6.90%
168 Camden NC 2,627 14.90% 7,286 41.20%
169 Whatcom WA 3,495 0.90% 6,846 1.70%
170 Harford MD 4,174 0.80% 6,751 1.20%
171 Santa Barbara CA 1,486 0.20% 6,747 0.70%
172 Liberty GA 4,161 3.00% 6,742 4.80%
173 Prince William VA 5,137 0.60% 6,695 0.70%
174 Pamlico NC 3,228 13.10% 6,656 26.90%
175 Bryan GA 3,906 6.20% 6,622 10.50%
176 Fairfax VA 3,076 0.10% 6,619 0.30%
177 Talbot MD 2,312 3.10% 6,609 9.00%
178 Island WA 3,987 2.30% 6,583 3.80%
179 Acadia LA 3,556 1.60% 6,448 2.90%
180 McIntosh GA 4,360 15.70% 6,321 22.80%
181 Coos OR 2,583 2.20% 6,317 5.50%
182 Wicomico MD 3,863 2.00% 6,201 3.20%
183 Pierce WA 1,311 0.10% 6,190 0.40%
184 Tyrrell NC 4,574 69.40% 6,046 91.80%
185 Kitsap WA 1,704 0.30% 5,903 1.10%
186 Kent RI 2,405 0.70% 5,834 1.70%
187 Mathews VA 2,665 16.20% 5,762 34.90%
188 Isle of Wight VA 4,710 6.70% 5,599 7.90%
189 Franklin FL 3,717 17.50% 5,588 26.40%
190 Jefferson Davis LA 2,632 4.80% 5,074 9.30%
191 King WA 1,210 0.00% 4,989 0.10%
192 San Patricio TX 2,638 2.20% 4,916 4.10%
193 Jasper SC 2,592 5.40% 4,876 10.20%
194 Bucks PA 2,115 0.20% 4,807 0.30%
195 Washington NC 3,200 12.70% 4,796 19.10%
196 Thurston WA 852 0.20% 4,753 0.90%
197 District of Columbia DC 2,005 0.20% 4,629 0.50%
198 Lafayette LA 2,406 0.50% 4,565 0.90%
199 James City VA 3,229 2.50% 4,472 3.50%
200 Cecil MD 2,547 1.20% 4,414 2.10%
201 Prince Georges MD 2,869 0.10% 4,366 0.20%
202 City of Alexandria VA 1,912 0.60% 4,335 1.50%
203 Matagorda TX 2,461 3.30% 4,303 5.80%
204 Providence RI 1,200 0.10% 4,242 0.40%
205 Pacific WA 1,924 5.20% 4,237 11.50%
206 Colleton SC 1,806 2.40% 3,993 5.30%
207 Clark WA 1,366 0.10% 3,984 0.40%
208 Napa CA 3,186 1.10% 3,877 1.30%
209 Rockland NY 1,721 0.30% 3,699 0.60%
210 Charles MD 2,419 0.70% 3,638 1.10%
211 Chowan NC 2,587 9.20% 3,528 12.60%
212 Calhoun TX 1,756 4.00% 3,508 8.00%
213 Gulf FL 1,442 5.30% 3,351 12.40%
214 Perquimans NC 1,429 5.70% 3,293 13.10%
215 Del Norte CA 146 0.30% 3,277 5.80%
216 Lincoln OR 1,375 1.40% 3,275 3.40%
217 Santa Cruz CA 724 0.10% 3,245 0.60%
218 Mercer NJ 2,100 0.30% 3,099 0.50%
219 Martin NC 1,194 2.70% 3,051 7.00%
220 Levy FL 1,975 2.30% 2,978 3.40%
221 Kent MD 1,630 4.70% 2,953 8.60%
222 Columbia OR 1,051 1.10% 2,793 3.00%
223 Baltimore City MD 723 0.10% 2,723 0.30%
224 Dukes MA 1,083 3.10% 2,621 7.60%
225 Sagadahoc ME 1,719 2.60% 2,584 3.90%
226 Stafford VA 1,768 0.60% 2,498 0.90%
227 Sonoma CA 1,359 0.10% 2,466 0.20%
228 San Luis Obispo CA 1,332 0.20% 2,444 0.40%
229 Taylor FL 1,312 3.20% 2,201 5.40%
230 Bertie NC 1,714 5.00% 2,118 6.20%
231 East Baton Roug LA 443 0.00% 2,115 0.20%
232 Gates NC 1,703 8.10% 2,007 9.50%
233 Northampton VA 1,013 5.70% 1,956 11.00%
234 Multnomah OR 443 0.00% 1,762 0.10%
235 Lancaster VA 963 4.40% 1,746 8.00%
236 Columbia NY 391 0.40% 1,670 1.50%
237 Clallam WA 738 0.50% 1,648 1.10%
238 Jefferson WA 713 1.10% 1,600 2.60%
239 Wahkiakum WA 539 9.10% 1,572 26.70%
240 Northumberland VA 804 3.40% 1,571 6.70%
241 Ulster NY 924 0.30% 1,562 0.50%
242 Mason WA 731 0.60% 1,551 1.30%
243 Dixie FL 858 2.50% 1,532 4.40%
244 King William VA 1,115 3.70% 1,490 4.90%
245 Douglas OR 786 0.40% 1,446 0.70%
246 Hancock ME 594 0.60% 1,436 1.40%
247 Rensselaer NY 343 0.10% 1,430 0.50%
248 Dutchess NY 550 0.10% 1,408 0.20%
249 Hertford NC 1,017 2.40% 1,402 3.30%
250 West Baton Roug LA 101 0.20% 1,324 2.90%
251 Westmoreland VA 753 2.20% 1,290 3.70%
252 Essex VA 1,021 4.90% 1,277 6.20%
253 Knox ME 591 0.80% 1,257 1.80%
254 City of Franklin VA 992 4.60% 1,249 5.80%
255 Orange NY 462 0.10% 1,242 0.20%
256 Tillamook OR 740 1.50% 1,172 2.40%
257 Charlton GA 480 2.10% 1,171 5.20%
258 Caroline MD 738 1.20% 1,164 2.00%
259 Middlesex VA 594 2.80% 1,162 5.60%
260 Cowlitz WA 493 0.30% 1,129 0.60%
261 King George VA 841 1.80% 1,106 2.30%
262 New Kent VA 844 2.20% 1,075 2.90%
263 Washington ME 506 0.90% 1,026 1.90%
264 Strafford NH 519 0.20% 995 0.40%
265 Greene NY 596 0.70% 951 1.10%
266 Lincoln ME 524 0.80% 884 1.40%
267 Southampton VA 534 2.30% 828 3.60%
268 Richmond VA 605 4.00% 806 5.40%
269 Nantucket MA 443 2.00% 801 3.60%
270 Albany NY 238 0.00% 722 0.10%
271 Hartford CT 329 0.00% 717 0.00%
272 City of Williamsburg VA 559 2.20% 680 2.70%
273 Passaic NJ 186 0.00% 628 0.10%
274 Lane OR 404 0.10% 610 0.10%
275 Willacy TX 410 1.30% 522 1.70%
276 Kleberg TX 189 0.30% 497 0.80%
277 Mendocino CA 147 0.10% 489 0.30%
278 Hampton SC 135 0.40% 450 1.30%
279 Somerset NJ 254 0.00% 440 0.10%
280 Curry OR 189 0.40% 423 0.90%
281 Jackson TX 248 1.10% 372 1.60%
282 King and Queen VA 226 1.90% 359 3.10%
283 San Juan WA 163 0.50% 349 1.00%
284 Putnam NY 169 0.10% 347 0.20%
285 Washington FL 176 0.40% 344 0.70%
286 Gilchrist FL 121 0.30% 342 1.00%
287 Surry VA 277 2.30% 335 2.70%
288 Williamsburg SC 109 0.20% 334 0.60%
289 Penobscot ME 122 0.00% 304 0.10%
290 Jones NC 168 1.00% 295 1.70%
291 Seminole FL 223 0.00% 246 0.00%
292 Waldo ME 128 0.20% 219 0.30%
293 Victoria TX 61 0.00% 215 0.10%
294 Jefferson FL 106 0.40% 206 0.80%
295 Effingham GA 37 0.00% 202 0.20%
296 Arlington VA 82 0.00% 187 0.00%
297 Charles City VA 100 0.70% 175 1.30%
298 Marion SC 90 0.10% 172 0.30%
299 Refugio TX 100 1.00% 148 1.50%
300 Columbus NC 44 0.00% 145 0.10%
301 Edgecombe NC 68 0.10% 117 0.10%
302 Kenedy TX 69 10.30% 100 14.90%
303 Lenoir NC 41 0.00% 99 0.10%
304 Prince George VA 53 0.10% 69 0.10%
305 Duplin NC 18 0.00% 68 0.10%
306 Bladen NC 20 0.00% 52 0.10%
307 Kennebec ME 26 0.00% 46 0.00%
308 Liberty FL 24 0.20% 39 0.30%
309 Lake FL 32 0.00% 32 0.00%
310 Northampton NC 15 0.00% 26 0.10%
311 DeSoto FL 19 0.00% 21 0.00%
312 Marion FL 9 0.00% 15 0.00%
313 St. Landry LA 7 0.00% 14 0.00%
314 Brantley GA 5 0.00% 12 0.00%
315 Florence SC 4 0.00% 10 0.00%
316 Skamania WA 2 0.00% 7 0.00%
317 Caroline VA 4 0.00% 6 0.00%
317 Wayne GA 0.00% 6 0.00%
319 Halifax NC 3 0.00% 5 0.00%