BMA spokesman Pongsakorn Kwanmuang said the 21 districts are Dusit, Bang Kapi, Khlong Sam Wa, Prawet, Taling Chan, Bangkok Noi, Bang Phlat, Thonburi, Nong Khaem, Bang Khae, Bon Bon, Bang Khun Thian, Thung Khru, Bang Kho Laem, Sathorn, Pathumwan, Wattana, Suan Luang, Bang Sue, Don Mueang and Lat Phrao.
Moreover, he said Internet cafés, massage parlours, fitness clubs, swimming pools and salons can remain open as usual.
Bars and nightclubs can also stay open but under certain conditions, including that staff are prohibited from being in close quarters with customers, while customers themselves are banned from dancing. And these venues must close by midnight.