A punishing heatwave has been gripping the western United States, with parts of the region logging record temperatures - even though it was still winter.A desert community in southwestern Arizona reached 43.3 degrees Celsius (110 Fahrenheit) on Thursday, breaking a record for the highest March temperature recorded in the United States. The record-setting temperature was recorded just outside Martinez Lake, Arizona, in the Yuma Desert.The previous record of 42.2 degrees had been set in Rio...