Hong Kong will ban all dine-in services at restaurants and public gatherings of more than two people not from the same family starting Wednesday, as the city’s worst coronavirus outbreak shows no sign of abating.

In a third round of rule-tightening in as many weeks, Chief Secretary for Administration Matthew Cheung said Monday that masks will also now be required in outdoors areas, with only medical exemptions.

Sports venues and swimming pools are also being shut, adding to a list of closed businesses that included gyms, bars and beauty parlours. The new restrictions are for an initial period of one week before they’ll be reviewed.

The Asian financial centre has been taken off-guard by the sudden jump of infections after managing to contain the spread locally as it tore across the world. Officials are now scrambling to slow what they’re calling a third wave, while boosting health-care facilities that are reaching capacity.

On Sunday, Hong Kong detected 103 local cases, the fifth consecutive day that new infections were above a hundred. Before this month, the reported number of daily locally transmitted infections had never topped 28.

The share of infections of unknown origins remains high at about a third, reflecting that hidden chains of transmission continue to surface despite tightened social distancing rules.

Authorities had previously banned dining-in after 6 p.m. and expanded mask-wearing requirements, from public transportation to indoor public venues.

Although the government is trying to boost testing and expand quarantine and hospitalization facilities, the long stretch that saw the city seemingly dodge the Covid-19 bullet has left its defenses low.

Isolation beds and wards in public hospitals have reached 80% capacity, while its total testing capacity is smaller than other places in the region that are also facing resurgences, like Australia’s Victoria state.

Unlike in some places where it’s mostly young people who are recently becoming infected, Hong Kong’s current surge is affecting an older group of people, raising the likelihood of more cases turning critical.