On 20 August 2018, Thunberg, who had just started ninth grade, decided not to attend school until the 2018 Swedish general election on 9 September; her protest began after the heat waves and wildfires during Sweden's hottest summer in at least 262 years. Her demands were that the Swedish government reduce carbon emissions in accordance with the Paris Agreement, and she protested by sitting outside the Riksdag every day for three weeks during school hours with the sign "Skolstrejk för klimatet" (school strike for climate).