SummaryTamil Nadu officials have issued a statewide alert due to a sudden uptick in chikungunya cases in multiple cities including Chennai, Villupuram, Tenkasi, Theni, Cuddalore, Chengalpattu, Kancheepuram and Ariyalur. It remains unknown how many people have been affected and if any deaths have occurred. The illness usually starts with flu-like symptoms including fever, chills, headache, nausea, vomiting, joint pain and rashes.