Tokyo’s governor, who has taken time off since last week due to severe fatigue, needs to rest several more days this week, the metropolitan government said Sunday, as experts warn a resurgence of the infections less than a month before the capital city hosts the Olympics.

Gov. Yuriko Koike has been resting since last Wednesday due to severe fatigue. She was to rest until Sunday but Tokyo metropolitan officials said she will be off several more days. She has been deeply involved with preparations for the Olympics and Paralympics as well as leading the capital’s coronavirus response. Officials refused to confirm media reports that Koike has been hospitalized.

After one year postponement, the Olympics will begin on July 23. Last week, Olympic officials decided to allow the public to attend the Games, though caps were set on spectators. Health experts have expressed deep concern the Games could cause the virus to surge in the Tokyo region.

Japan last week eased a state of emergency in most other areas, but daily new cases have already been rising back in Tokyo, and experts have warned of further increase of the infections as the Delta strain of the virus spreads.

Tokyo on Sunday reported 386 new cases, up from 376 a week earlier as the capital makes a week-on-week increase for a eighth consecutive day. Japan had 794,457 cases and 14,657 deaths as of Saturday.