<span style="color: #222222;">The threat of the Philippines' Taal volcano unleashing a potentially catastrophic eruption remains high. The authorities have warned today that it was showing dangerous signs.<br />''</span><br />'' <span style="color: #222222;">Scores of earthquakes rattle the region daily and large fissures are opening up in the ground, which means the magma that would fuel a major eruption is still flowing beneath. Authorities are struggling to deal with nearly 50,000 evacuees, who fled to shelters after Taal burston Sunday.</span><br />'' <span style="color: #222222;"><br />''<br />''The country's most powerful explosion in recent years was the 1991 eruption of Mount Pinatubo, about 100 kilometres northwest of Manila, which killed more than 800 people.</span><br />