yesterday was officially hottest day of 2015 with a high of 22.7 c - with temperatures rising to 25c today .
weather caused by warm air from azores is creating conditions we might usually experience in july or august .
it is set to get cooler later in the week but temperatures will remain higher than the average for this time of year .
families are warned to use suncream if they are relaxing outside while firefighters issue warning over fire risks .