The Met Office's rare severe weather warning for heat has been extended to a second day. The forecasting service says some "exceptionally high temperatures" are possible on Sunday and Monday and could lead to widespread impact on people and infrastructure.
BBC Weather is saying Cardiff will be hotter on Monday with highs of 34°C, compared to 31°C on Sunday. And the Met Office says that the high temperatures could also be seen on Tuesday.
Wales experienced its hottest day of the year on Monday (July 11) when temperatures hit 28.7°C at Cardiff's Bute Park. There will be a slight dip in temperatures during the middle of this week, but they are expected to soar again by the weekend.