Gaza faces a severe humanitarian crisis after heavy winter rains and freezing temperatures caused widespread flooding and at least 22 fatalities, including infants Rahaf Abu Jazar and Taim Jawaja.The UN says about 1.5 million people lack shelter, and hundreds of thousands displaced in tent camps are wading through sewage, mud and debris as UN agencies including UNICEF and WHO and aid group Oxfam warn of outbreaks of waterborne disease and urgent needs for shelter, fuel and medical supplies.Oxfam and Gaza authorities accuse Israel of restricting crucial supplies while COGAT and Israel say aid convoys and nearly 270,000 tents have been coordinated, and the United States is urging a swift transition in the fragile truce, a situation also covered in a "PBS NewsHour" segment by Ali Rogin interviewing Jonathan Crickx.