Gwynedd in north Wales has the second highest rate of Covid cases in the UK, when compared to all other local authority areas.
Figures show Gwynedd's rate increased from 604 cases per 100,000 of the population to 878 between November 11 and 18.
The Vale of Glamorgan also ranked twelfth worst with a case rate of 666.7 over the same time period.
Torridge in Devon continues to have the highest rate in the UK, with 699 new cases in the seven days to November 18 - the equivalent of 1,017.2 per 100,000 people.
1,099 new cases were recorded in Gwynedd in the seven days leading up to November 18.
It comes as a time where the NHS is under pressure and medical staff say resources are stretched. One doctor at Ysbyty Gwynedd in Bangor told ITV Wales that staff are 'harming patients' because the situation is so dire.
The Welsh local authority with the lowest Covid rate was Ceredigion, where the number is 255.2 per 100,000 people. The area did still see an increase in cases though when compared to the week leading up to November 11.
The figures for the seven days to November 18 are based on the number of people who have tested positive for Covid-19 in either a lab-reported or rapid lateral flow test.
Of the 377 local authority areas in the UK, 79% have seen a week-on-week rise in rates, while 20% have seen a fall.
The Covid case rates for all Welsh local authority areas in the seven days up to November 18:
Gwynedd - 878.0 (1099 cases)
Vale of Glamorgan - 666.7 (902 cases)
Monmouthshire - 577.9 (550 cases )
Wrexham - 572.6 (779 cases)
Pembrokeshire - 547.5 (694 cases)
Merthyr Tydfil - 532.9 (322 cases)
Torfaen - 513.5 (487 cases)
Powys - 511.2 (680 cases)
Cardiff - 501.4 (1851 cases)
Swansea - 487.5 (1202 cases)
Caerphilly - 482.0 (876 cases)
Neath Port Talbot - 479.3 (692 cases)
Denbighshire - 475.9 (460 cases)
Flintshire - 474.3 (744 cases)
Newport - 466.0 (729 cases)
Rhondda Cynon Taf - 464.7 (1124 cases)
Blaenau Gwent - 448.4 (314 cases)
Bridgend - 435.8 (643 cases)
Isle of Anglesey - 423.1 (298 cases)
Conwy - 373.1 (441 cases)
Ceredigion - 255.2 (186 cases)