MANILA, Philippines—A powerful typhoon slammed into the southeastern Philippines on Thursday, toppling trees, ripping tin roofs, and knocking down power as it blew across island provinces where nearly 100,000 people have been evacuated. Coast guard personnel were rescuing residents stranded by chest-deep waters in a southern province, where pounding rains swamped villages in brownish water. In southern Cagayan de Oro city, footage showed two rescuers struggling to keep a month-old baby inside a laundry basin above the waters and shielded from the wind and rain with an umbrella. Forecasters said Typhoon Rai further strengthened with sustained winds of 195 kilometers (121 miles) per hour and gusts of up to 270 kph (168 mph) as it blew from the Pacific Ocean into the Siargao Islands. There were no immediate reports of casualties or major damage. “I’m scared and praying here in my house that this stops now. The wind outside is …