Punjab Disaster Management Authority has cautioned that heatwave is expected in Punjab till Monday during which temperature may rise up to 45 to 48 degrees centigrade.The PDMA spokesman said that heatwave may be severe in districts of Southern Punjab Bahawalpur, Rahim Yar Khan, DG Khan and Multan.All concerned departments have been directed to remain alert to meet any untoward situation. The Spokesman said citizens are being made aware about dangers of heatwave through media.People can contact PDMA Helpline 1129 or Rescue 1122 in case of any emergency.Source: Radio Pakistan