"Yesterday, records were registered in Birzai, Dotnuva, Klaipeda, Laukuva, Raseiniai, Siauliai, Telsiai, Ukmerge and Utena. Temperatures hit 27-29 degrees Celsius, a record high for May 20 in most of Lithuania," Margarita Kirkliauskaite of the Lithuanian Hydrometeorological Service told BNS.
However, Monday's temperatures fell short of breaking Lithuania's absolute heat record for May 20, which was set at 29.4 degrees in Lazdijai in 1937.
Forecasters will not be able to say if temperatures will hit new record highs on Tuesday until final data from monitoring stations come in after 9 p.m., according to Kirkliauskaite.
The highest temperatures for May 21 were registered in many districts across the country in 1993 and 2013. The mercury then rose to 27-30 degrees.
"If we don't break these records, we'll be very, very close today," Kirkliauskaite said.
She forecasts temperatures to stay at 24-28 degrees in most of the country through Thursday before giving way to a cooler period with more rain on Friday.