Financial support of £120m will be available for nightclubs, events, retail, hospitality, leisure and tourism businesses affected by the move to alert level two.
Bydd cymorth ariannol o £120m ar gael i glybiau nos, digwyddiadau, busnesau manwerthu, lletygarwch, hamdden a thwristiaeth y bydd y newid hwn i lefel rhybudd dau yn effeithio arnynt.