Woman using an umbrella to protect herself from the sun in Porto Alegre Ronaldo Bernardi/ Agencia RBS Rio Grande do Sul recorded typical summer temperatures in the middle of winter this Saturday (18), before the forecast of severe storms in several regions of the state. According to a Climatempo survey, five cities exceeded 35°C throughout the day. The highest temperature was recorded in Rolante, with 36.7°C. Next come Três Forquilhas, Três Coroas, Maquiné and Morrinhos do Sul. Check out the table below. ? Access the g1 RS channel on WhatsApp Highest temperatures in RS this Saturday (18) Two other cities also reached the 35°C mark: Caraá and Nova Hartz, both with 35°C. The heat was accompanied by a feeling of stuffiness in much of the state. According to Climatempo, the scenario is the result of the action of a cold front over the south of Brazil, combined with the intense transport of heat and humidity and the strong low-level jet. READ ALSO: With wind gusts of up to 104.9 km/h, RS has 16 cities with disturbances Porto Alegre breaks temperature record for July since 1910 What to do in case of hail, gales, floods and landslides Storm forecast Find out what to do in case of extreme weather according to Civil Defense The change in weather should occur between the afternoon and evening of this Saturday, when the instabilities gain strength and advance over Rio Grande do Sul. The most critical conditions cover the West, Campaign, Missions, Northwest, Center, South, Costa Doce, Metropolitan Region, Valleys, Middle Coast and Serra. The forecast indicates heavy to intense rain, frequent lightning, hail and wind gusts between 70 km/h and 90 km/h, with the possibility of higher speeds in isolated points. Rain volumes can vary between 30 and 100 millimeters, with accumulations of over 150 millimeters in areas of the South, Campanha and West, mainly during the night. According to Climatempo, the scenario is also favorable for organized storms, microexplosions and the isolated possibility of tornadoes, especially between the Campaign and the Midwest of the state. The instability is expected to continue on Sunday (19). The cold front advances slowly and maintains the risk of intense rain and storms in practically all regions of Rio Grande do Sul. Accumulations can vary between 40 and 100 millimeters and exceed 150 millimeters in isolated points. Adding the volumes predicted for Saturday and Sunday, some locations may exceed 300 millimeters of rain, increasing the risk of flooding, flash floods and other disturbances. VIDEOS: Everything about RS