Learn Spanish (Latin America): El evento fue desastroso; encima, ahora hace mucho frío. - The event was disastrous; to make matters worse, now it's very cold.

While y simply links two facts, encima literally means on top. Here, it is used as a connector to mean on top of that or to make matters worse. It escalates the situation, emphasizing that the bad weather is piling onto an already disastrous event.

Why do we use fue instead of estuvo to describe the event?

We use the verb ser (past tense fue) to talk about an event taking place. Even if you think of a disaster as a temporary state, events like parties, concerts, or meetings always use ser to describe where they happen and how they turned out.

Why does the sentence use hace instead of está for the weather?

To describe general weather conditions, Spanish often uses the verb hacer (to do or to make). When you say hace frío, you are literally saying it makes cold.

Why is it mucho frío and not muy frío?

In the phrase hace frío, the word frío acts as a noun (coldness), not an adjective. Because it is a noun, you must modify it with mucho (a lot of) rather than muy (very).