The temperature topped 34.6 C in Wisley, England, on Tuesday while Scotland and Northern Ireland saw their hottest days of the year.
Related stories
Dog brains track consonant patterns in speech, a first outside humans
Lactose-intolerant consumers pay more for lactose-free ice cream in study
Learning style predicts survival skills in young orangutans
New catalogs map the quantum possibilities of atomically thin materials
Copying others can help young orangutans build a broad diet
Dogs pay more attention to consonants than vowels when we speak